Stanley FatMax Retractable utility knife black colors has ergonomic design that insures easy use and has blade wiper that eliminates dirt. Knife of 6 5/8" long is made of metal along with rubber grip for proper handling. Thickness: 7/8". Material: Blade - steel, knife - metal with rubber grip. Handle type: Ergonomic. Yellow and black. Overall length: 6 5/8". Dimensions: 1 3/8"(W). Blade wiper removes excess dirt and protects knife. Blade clamp eliminates blade wobble, gives control, push-button blade change- no tools needed. Ergonomic design for ease of use, pop-up blade dispenser for easy access and fast changeover. Soft touch panels/grips allow better control, fewer slips. 6 5/8" long retractable utility knife features slip resistant ergonomic grip with adjustable locking thumb dial and rear blade storage.