This versatile heavy-duty safety knife features a spring-activated blade that automatically retracts the instant the blade loses contact with the cutting surface, helping to reduce potential injuries in the workplace. The cutter has a slip-resistant ergonomic handle and stainless steel blade channel that tightly secures the blade. Cutting depth: 19mm. For right and left handed users. Includes SKB blade. Fits HOB, RSKB and SKB blades.