Cut tin, ductwork, soffit and other materials * Forged and hardened high carbon alloy steel jaws with serrated cutting edges * Compound hinges deliver more force with less effort * Set Includes: (1) Right Cut Aviation Tin Snips (# 3636); (1) Left Cut Aviation Tin Snips (# 3641); (1) Straight Cut Aviation Tin Snips (# 3646) * Lifetime replacement guarantee