Self-Retracting Safety Knife (SK-4) | OLFA - ProfessionalOLFA – Professional


  • Spring-activated, self-retracting blade
  • High-impact ABS handle
  • Textured blade slide with thumb-stop for precise control
  • Heavy-gauge stainless steel channel provides secure blade hold
  • Lanyard hole for tethering
  • Preloaded with SKB-2 Safety Blade
  • Accepts SKB-2, SKB-2S, RSKB, and HOB Safety Blades
  • Cutting depth up to .75-inch (19mm)


$10.65 Suggested MSRP
Where to Buy

Level One Safety Cutter

Safety experts rely on OLFA® cutting tools like the SK-4 Self-Retracting Safety Knife for its enhanced level of protection.

This Level One safety cutter features a textured, slip-resistant ergonomic handle that increases grip and control for safer use. A gently curved blade slider and spring blade that automatically retracts add to the knife’s safety.

With a simple flip of the blade, the SK-4 is easily configured for both right- and left-handed users.

Use the SK-4 Self-Retracting Safety Knife knife for cutting light to heavy-duty materials such as cardboard, packaging, film, bagged goods, trimmings, shrink wrap, strapping, and tape. (SK-4, #9048)

Also available in 24 unit display – SK-4/24 (#1088215)

Cutting Specs

Cutting Depth: 0.75″ (19mm)

WARNING: California Proposition 65 Warning

 SK-4 Safety Knife Sell Sheet

 Download: SK-4 Blade Replacement/Left-Hand Use


OLFA cutter & non-disposable scraper handles, locking mechanisms, and 9mm standard duty blades, 18mm heavy duty blades, 25mm extra-heavy duty blades, safety and trapezoid-shaped blades and scraper blades are subject to the Corelle Brands d/b/a/ OLFA - North America satisfaction guaranteed or replacement policy.*

If at any time you are dissatisfied with these “Satisfaction Guaranteed” products, Corelle Brands d/b/a/ OLFA - North America will provide an equally valued replacement. Please allow 4 to 6 weeks for delivery of replacement product. Should you be dissatisfied with any such product, please keep it. You may be asked to return it. Please contact our Consumer Care Center for warranty claims.

*PLEASE NOTE: This Policy does not apply to OLFA TouchKnife®, OLFA scissors, OLFA mats, OLFA rulers, disposable OLFA multi-purpose scrapers, all styles and models of 18mm, 28mm, 45mm, 60mm, rotary cutter replacement blades, and all styles and models of “KB” art knife replacement blades.