Accelerator Assisted Opening Linerlock. 4 3/8" closed. 420HC high carbon stainless blade with scratch resistant "Diamond Black" boron carbide coating and ambidextrous thumb studs. "Accelerator" mechanism for smooth, quick assisited opening. Black hard anodized 6061-T6 aluminum handles with black jigged bone onlays and skull logo shield. Black finish stainless pocket clip. Black metal gift/display box. Made in the USA.