Stiletto designed the Fairbairn–Sykes fighting knife, a double-edged dagger with a long narrow point designed to optimize the blade for thrusting, though it was also capable of slashing strokes if the cutting edges were sharpened. Other variations of the F-S knife soon emerged, including the U.S. Marine Raider Stiletto, which was based upon the Fairbairn-Sykes knife, and the U.S. V-42 stiletto, designed from the outset to emphasize thrusting over cutting. During the 1950s, large numbers of folding switchblade or automatic opening knives with locking blades were imported from Italy to the United States. Most of these switchblades were side-opening designs, though
Stiletto heel heavy-feeling legs, and have been found to provoke venous hypertension in the lower limbs. Despite their impracticality and fluctuating demand, they persist as a fashion option. Stiletto heels concentrate a large amount of force into a small area. The great pressure under such a heel, which is greater than that under the feet of an elephant, can cause damage to carpets and floors. The stiletto heel, unless equipped with a "heel stopper", can be impractical for outdoor wear on soft ground (such as grass, sand or mud), or in environments where floor damage is unacceptable (Lino/soft wood floors in a