It attaches to your keychain and is nearly as small as your car keys, One of Spyderco's smallest lightweight knife is the Ladybug.
Made of VG-10 stainless steel, the hollow ground blade comes in a SpyderEdge or PlainEdge configuration. This modified clip-point blade style is matched up with a black, lightweight handle of fiberglass-reinforced nylon resin making the entire knife weigh only 0.6 of an ounce (16.4 grams). The LBK3 doesn't have a clip but rather a lanyard hole for attachment to a keychain or lanyard.
M.S.R.P From £53.99