Olfa

SK-8 Fully Automatic Self-Retracting Safety Knife

Name: SK-8 Fully Automatic Self-Retracting Safety Knife
Brand: Olfa

EU available

Die-cast aluminium nose reinforces the wear point plastic cutters crack at first. Retraction can't be overridden even with the slider engaged, per Olfa's spec — a rare non-defeatable safety claim at this price.

$16 typical

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EDITION 01RESEARCHED 2026-08-123 SOURCESREFRESH DUE 2027-02

SUBSTANCE SCORES

substance8.7/ 10

design6.5/ 10

value8.0/ 10

WHY THE PRICE IS JUSTIFIED

For modest money it adds a die-cast aluminium nose at the wear point and a safety system that cannot be held out by keeping the slider engaged—substantial improvements over basic plastic box cutters.

MATERIALS

Nose/headDie-cast aluminium

Reinforces the high-wear impact and blade-guide area.

HandleHigh-impact ABS

Keeps the full grip light and resilient.

BladeCarbon steel

Replaceable industrial cutting edge.

CRITERIA

8/10

Blade Control

Oversized textured slider and reinforced head.

10/10

Safety Retraction

Retraction cannot be overridden even with slider engaged.

9/10

Grip Ergonomics

Non-slip cushion-grip handle.

9/10

Mechanism Durability

Die-cast aluminium nose reinforces wear point.

8/10

Blade Serviceability

Uses replaceable SKB-8 blades.

8/10

Carry Utility

Lanyard point and safe automatic closed state.

IDEAL FOR

·Warehouse carton cutting
·Film and shrink-wrap
·Cost-sensitive safety programs

NOT FOR

·Precision craft work
·Prying or rigid-material levering

DESIGN & ERGONOMICS

The large textured slider, cushion grip and lanyard hole make it a functional, no-nonsense warehouse object. It is less refined in hand than the Martor squeeze designs.

LONGEVITY

The reinforced nose addresses the usual plastic cutter wear point. Replacement SKB-8 blades are available; keep the spring track clean and retire it if retraction slows.