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Arborist-Grade Pull Cuts. Without the Snap.

Cosari RazorLock SK5

Slices a 3.5-inch live limb in about 9 seconds on the pull stroke, folds with zero exposed teeth, and won't.

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  • ✓ 8" Impulse-Hardened SK5 Steel (64–67 HRC)
  • ✓ Cuts 4" Live & Cured Limbs on
  • ✓ Positive Steel Gear Lock, Zero Exposed Teeth
  • ✓ 30-Day Money-Back Guarantee + Free Tracked Shipping
Cosari RazorLock SK5
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Built Like a $65 Arborist Saw. Priced Like a Hardware-Store One.

Every detail is aimed at the two things that ruin folding saws: blades that bend or snap, and locks that slip.

Triple-Ground 7 TPI Teeth

Each tooth is ground on three faces to slice wood fibers on the pull stroke. Let the saw do the work with almost no downward pressure.

64–67 HRC Impulse-Hardened SK5

Only the tooth tips are flash-hardened, so they stay sharp through dry oak while the blade body stays flexible enough to survive a pinch.

Positive Steel Gear Lock

A metal lock clicks rigid at full extension with zero wobble, and locks the blade shut when folded. No plastic spring button to clog.

Zero Exposed Teeth Folded

All 8 inches tuck fully inside the handle channel. Toss it in a tote, glovebox or work-pant pocket without snagging fabric or fingers.

How the RazorLock SK5 Cuts Cleaner and Lasts Longer

Teeth Slice, Gullets Clear

Teeth Slice, Gullets Clear

Triple-ground teeth cut on the pull while deep U-shaped gullets carry wet sawdust out of the kerf, so the blade doesn't gum up in sappy green wood.

Steel Lock Holds It Rigid

Steel Lock Holds It Rigid

The gear lock seats into the blade tang with a crisp click. No side play, no up-and-down wobble, no chance of folding onto your knuckles mid-cut.

Folds Fully Safe

Folds Fully Safe

Press the lock, fold the blade, and every tooth disappears into the handle. It locks closed too, so it stays shut in a pocket or bag.

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Excellent4.8 (247)Trustpilot

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Cosari RazorLock SK5

8-Inch Impulse-Hardened SK5 Folding Pruning Saw with Steel Gear Lock

Backed by our 30-Day Money-Back Trial & Full 2-Year Cosari Warranty.

$24.99 $49.99 Free Tracked Shipping Included

In Stock: Ships in 1–2 Days. Free insured delivery with tracking.

30-Day Money-Back Guarantee plus a full 2-Year Warranty.

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Description

Why SK5 Steel:: SK5 is a Japanese high-carbon tool steel that takes a much harder, longer-lasting edge than the mild steel used in many budget saws. Impulse hardening brings the tooth tips to 64–67 HRC while the blade body stays at a spring-tempered 50–52 HRC.

Who It's For:: Homeowners, orchard and fruit-tree growers, acreage caretakers, hunters and trail maintainers who cut limbs from 1 to 4.5 inches and want a tool that skips the fuel, batteries and noise.

What It's Not For:: It isn't built for felling trunks over 4.5 inches, and the hardened teeth can't be resharpened with a standard file. For yard and orchard limbs, it's the right size.

Shipping & 30-Day Returns

Free Shipping: Every order ships free with full tracking within 24 hours.

30-Day Trial: Try it at home for 30 days risk-free. Need help? Email us anytime at support@buycosari.com.

2-Year Warranty: If anything goes wrong within 2 years, we replace it free of charge or refund your order in full.

Why Choose the Cosari RazorLock SK5?

Cosari RazorLock SK5 Detail

Taper-Ground Anti-Bind Blade

The blade is ground thinner toward the spine, so it slides through the kerf without pinching, even in wet green maple.

Chip-Clearing U-Gullets

Deep curved gullets between tooth groups dump sawdust every stroke instead of packing up on pine and willow.

Non-Slip Hooked TPR Grip

A tacky rubberized handle and curved rear hook keep sweaty, sappy or gloved hands from sliding toward the blade.

Cosari RazorLock SK5 vs. Ordinary Alternatives

Cosari RazorLock SK5Standard Competitors

FeatureCosari RazorLock SK5Standard Competitors
3.5" live pine limb9.1 sec, 11 strokes18–19 sec, bound mid-cut
After 50 dry oak cutsStill catches a thumbnailNoticeably dull and dragging
15° pinch, 35 lb loadSprings back straightPermanent bend or snap risk
Lock typeSteel gear lock, open & closedPlastic spring button
Teeth exposed when folded0mmTips can snag fabric

What's Included

In the Box
  • 1 × Cosari RazorLock SK5 8-Inch Folding Pruning Saw
  • 1 × Protective Blade-Tip Shipping Guard
  • 1 × Printed Care & Pruning Quick-Start Guide
Technical Specifications
  • Blade Length: 8.0 in (210mm)
  • Blade Steel: Japanese SK5 high-carbon steel, taper-ground
  • Blade Thickness: 1.4mm tapering to 1.1mm at the spine
  • Tooth Pattern: 7 TPI triple-ground pull-stroke teeth with U-gullets
  • Hardness: 64–67 HRC tooth tips, 50–52 HRC spring-tempered body
  • Max Branch Diameter: 4.5 in
  • Closed Length: 9.5 in
  • Weight: 9.2 oz (260g)
Care & Safety
  • After cutting sappy wood, wipe the blade with a dry rag. For hardened resin, a little mineral spirits or citrus cleaner works well. Dry it fully before folding.
  • Put a light film of oil on the blade before long storage, and keep it in a dry spot. The hardened teeth can't be filed, so avoid cutting into soil, stone or nails.
  • Backed by our 30-Day Money-Back Guarantee & 2-Year Warranty
  • Customer Support: support@buycosari.com
In the Box Cosari RazorLock SK5

Open, Cut, Fold. That's It.

Swipe left for steps 2 and 3

  1. Press & Lock Open
    1

    Press & Lock Open

    Press the steel lock button and swing the blade out until it clicks rigid at full extension.

  2. Let the Pull Stroke Bite
    2

    Let the Pull Stroke Bite

    Set the blade just outside the branch collar and draw it back smoothly. Light pressure, long strokes.

  3. Clean Cut, Safe Fold
    3

    Clean Cut, Safe Fold

    The limb drops with a smooth, untorn face. Press the lock and fold the blade safely back into the handle.

Verified Customer Reviews

What 200+ Verified Buyers Say About the Cosari RazorLock SK5

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Based on 247 verified reviews
5 Stars
212
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97% of buyers recommend the Cosari RazorLock SK5
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✓ Verified Purchase
Mark T. — Eugene, OR2 days ago

Didn't even bother mixing gas for my chainsaw

I honestly didn't even bother mixing gas for my chainsaw this weekend—this thing zipped through 3.5-inch live maple and oak branches on the pull stroke like warm butter. Those U-shaped gullets between the tooth clusters actually dump the wet green sawdust instead of packing up solid.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

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✓ Verified Purchase
Dave R. — Boise, ID4 days ago

Zero exposed teeth when folded up

Pay attention when folded: NOT A SINGLE TOOTH sticks out of the handle channel. My old hardware store saw chewed holes in two Carhartt pockets and sliced my thumb reaching for my keys. Solid metal click when it locks open and zero up-and-down blade wobble.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

✓ Verified Purchase
Greg H. — Asheville, NC6 days ago

Thick SK5 spine doesn't kink like cheap blades

My old Fiskars bent into a permanent kink the second it pinched in green wood. This SK5 spine is noticeably thicker and springs right back dead straight even when a heavy limb shifts mid-cut.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

✓ Verified Purchase
Kevin M. — Bend, OR1 week ago

Cuts right with my $65 saw without the brittle tip

Bought a $65 Silky last spring and snapped 2 inches off the tip on day three when my brother-in-law pushed too hard on the forward stroke. This cuts 95% as fast for a fraction of the price and the blade isn't brittle glass.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

✓ Verified Purchase
Linda S. — Fredericksburg, TX1 week ago

Saved my 68-year-old arthritic wrists

My 68-year-old hands have terrible arthritis and heavy bypass loppers wreck my wrists. With this ergonomic rubber grip and the curved rear hook on the handle, I barely even have to squeeze—just pull lightly and let the teeth do the work.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

✓ Verified Purchase
Paul W. — Wenatchee, WA2 weeks ago

Cleanest bark collars on our apple and peach trees

Zero downward force needed. Let the triple-ground teeth bite on the pull stroke and it leaves a mirror-smooth cut that won't hold water or rot our fruit trees. Not a single torn bark strip at the bottom of the cut.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

✓ Verified Purchase
Brian K. — Tulsa, OK2 weeks ago

Stays razor sharp even on cured oak smoker chunks

Cut through fifty cured oak and hickory chunks for my offset smoker pit and the impulse-hardened teeth still catch my thumbnail like the minute I got it. Usually seasoned hardwood dulls a pruning saw in one afternoon.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

✓ Verified Purchase
Cody J. — Missoula, MT3 weeks ago

Lives permanently in my Tacoma door pocket

Lives permanently in my Tacoma door pocket for downed limbs across logging roads and hunting trails. Weighs nothing, takes up zero space, and works every single time without needing batteries or bar oil.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

✓ Verified Purchase
Steven L. — Roanoke, VA3 weeks ago

Way safer on an extension ladder than a mini chainsaw

Way quieter and safer up on a ladder than trying to one-hand a mini battery chainsaw over your head. Doesn't kick back or grab on small shoots. Only wish it came in a high-vis yellow handle option too, though the orange accents show up fine in tall grass.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

✓ Verified Purchase
Rick D. — Bangor, ME1 month ago

Pine pitch wipes right off the blade

Cleared out a dozen lower white pine limbs along our driveway fence. Wet pine sap usually glues a saw blade into the kerf after three cuts, but the taper-ground blade and deep gullets kept moving smoothly without binding up.

Verified Purchase · Austin, TX · Cosari RazorLock SK5

Put the Chainsaw Away. This Is the Saw You'll Actually Grab.

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Frequently Asked Questions

Does it lock in both the open and closed positions?

Yes. The steel gear-lock button holds the blade rigid when open and also locks it shut inside the handle, so it won't swing open in a pocket or bag.

Are any teeth exposed when the saw is folded?

No. All 8 inches of the blade recess fully inside the handle channel, with 0mm of teeth showing.

Will it cut both live green wood and dry hardwood?

Yes. The 7 TPI triple-ground teeth and deep U-gullets cleared wet pine and maple sawdust without clogging, and stayed sharp through 50 cuts of seasoned white oak.

Will the blade snap if I push on the return stroke?

It's designed to resist that. The tooth tips are hardened to 64–67 HRC, but the 1.4mm SK5 body is spring-tempered at 50–52 HRC so it flexes and recovers. In our 35 lb off-axis pinch test it returned perfectly straight. It still cuts best on the pull.

What's the thickest branch it can cut?

Up to 4.5 inches in diameter. It's fastest on limbs between 1 and 4 inches. It isn't meant for felling whole trunks.

Does it work for left-handed users?

Yes. The lock and grip are symmetrical, so it works the same in either hand.

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