TEKTON 91808 Aviation Tin Snips Set, 3-Piece Cut tin, ductwork, soffit and other materials and hardened high carbon alloy steel jaws with serrated cutting edges Compound hinges deliver more force with less effort Serrated cutting edges Set Includes: (1) Right Cut Aviation Tin Snips (# 3636); (1) Left Cut Aviation Tin Snips (# 3641); (1) Straight Cut Aviation Tin Snips (# 3646)