The SCIMAKER Dual-Mode Snap-Off Utility Knife, 18mm is a snap-off utility knife for packing, shipping, and everyday warehouse work: lock the blade for long cuts or hold a button for a blade that retracts on release, with an 18 mm (0.71 in) high-carbon steel blade.
Two Cutting Modes in One Handle
Lock Mode
Push the slider forward and the blade locks in place for long, continuous cuts. Slide it back by hand when the job is done.
Auto-Retract Mode
Press and hold the separate button to extend the blade. Let go and a spring pulls the blade back into the handle.
Use Lock Mode for a long cut down a cardboard seam and Auto-Retract Mode for quick passes across packing tape, without changing tools.
What the 18 mm Blade Is For
The 18 mm blade suits cardboard boxes, shipping cartons, shrink wrap, and tape in stockrooms, packing stations, and warehouses. When the edge dulls, snap off the used segment to expose a fresh one.
Trimming paper, film, vinyl, or crafts? Choose the 9 mm Dual-Mode Snap-Off Utility Knife.
Built for Daily Cutting
An internal metal rail guides the blade during the cut. The rigid ABS body has black TPR rubber grip zones, the layout works in either hand, and no batteries are needed. The handle stores up to 2 spare blades.
How It Compares
| This knife | SCIMAKER Lobster Safety Cutter & Box Opener | |
|---|---|---|
| Blade | Extendable snap-off blade, high-carbon steel, 18 mm | Recessed SK-2 alloy steel blade, fixed inside the body |
| Blade control | Lock Mode slider and Auto-Retract Mode button | No slider or button; hook the tape and pull |
| Blade replacement | Snap off dull segments; refill with standard 18 mm snap-off blades | Not replaceable |
| Made for | Cartons, packaging, tape, long cuts, and trimming | Packing tape, envelopes, mailers, shrink wrap, and light packaging |
Specifications
| Brand | SCIMAKER |
| Model | HKA04 |
| Product type | Snap-off utility knife |
| Cutting modes | Lock Mode (push-and-lock slider); Auto-Retract Mode (press-and-hold button, spring return) |
| Blade width | 18 mm (0.71 in) |
| Blade material | High-carbon steel |
| Blade guide | Internal metal rail |
| Handle | ABS body, TPR rubber grip |
| Color | Black and yellow |
| Hand orientation | Ambidextrous |
| Power | Manual, no batteries |
| Spare blade storage | Up to 2 blades in the handle |
| Compatible refills | Standard 18 mm snap-off blades |
What’s in the Box
| Option | Contents |
|---|---|
| 1 Knife + Blade Box | 1 knife (18 mm), 1 box of 10 replacement blades |
| 2 Knives + Blade Box | 2 knives (18 mm), 1 box of 10 replacement blades |
FAQ
What is the difference between Lock Mode and Auto-Retract Mode?
Lock Mode holds the blade out until you slide it back. Auto-Retract Mode extends the blade only while you hold the button and pulls it back when you let go.
Should I choose 18 mm or 9 mm?
Choose 18 mm for boxes, cartons, shrink wrap, and tape. For paper, film, vinyl, thin cardstock, and crafts, choose the 9 mm knife.
What refill blades does it take?
Standard 18 mm snap-off blades.
Can left-handed users use it?
Yes. The layout is ambidextrous, so the same knife works in either hand.
Does it need batteries?
No. Both modes are manual; the auto-retract action uses a spring.
Returns and Warranty
You can request a return within 30 days of receiving your order for unused items in original condition and packaging. See our Refund and Returns Policy.
Related Products
Need a narrow blade for paper and crafts? See the SCIMAKER Dual-Mode Snap-Off Utility Knife, 9mm. Need a hidden-blade opener for tape and mailers? See the SCIMAKER Lobster Safety Cutter & Box Opener. Prefer trapezoid blades in an aluminum handle? See the SCIMAKER Dual-Mode Heavy Duty Utility Knife. Browse all utility knives.
