Optisafe and Maxisafe knives feature a safety spring that allows the automatic blade to "shoot-back" into the handle even in response to any uncontrolled movement. The Maxisafe knife has a longer blade extension than the Optisafe knife. The Maxisafe three-sided cutter is similar to the Maxisafe knife, except it features a three-sided blade slider.
The Multisafe safety knife has a die-cast zinc body and spring-loaded blade slider on top for horizontal cutting work only.
The Profi automatic retractable safety knife is equipped with a lightweight aluminum body and a deep-edged trapezoid blade. The spring-loaded blade retract system is designed to respond to any uncontrolled movements, or when the thumb is removed from the slider.
The Ultrasafe safety knife with automatic open-frame blade guarding function is ideal for safe opening of plastic and paper sacks.

This is only for Martor, Model 8152. It may differ from the image shown in color, features, may be an accessory, etc. Please refer to the model number or contact us if you have any questions.