Stanley Fatmaxâ® Spring Assist Knife | Sta010320 One-handed open/close Tool-free blade changes Stainless-steel belt clip Uses standard utility and hook blades Quick Change Fixed Blade 1-Handed Open/Close Stanley Fatmax® Spring Assist Knife | Sta010320 The Spring Assist Knife offers a push-button for quick opening of the knife as well as a bi-material grip for comfort. The Stanley 10-855 5-3/4 inch Folding fixed utility knife features an aluminum design for durability and lightweight. It offers a one-handed open/close feature, with tool-free blade changes to make the task Quick and easy for everyone. It also has a stainless-steel belt clip for convenience to keep it close and handy while you are working on projects. It has a 4-inch handle with a 2-7/16 inch blade length. This knife accepts standard utility and hook blades. Features Dispenser repositions and removes from surfaces without leaving residue Bright, assorted colors of flags draw attention to important areas Self-adhesive flags remove cleanly without damaging the paper Quick-Change Retractable Utility Knife