The 3/4″ Steel (Black Oxide) Two-Piece Clamp Shaft Collar with Keyway is precision-machined steel that offers strength, durability, and wear resistance, while the black oxide finish provides corrosion protection, improved appearance. Its two-piece clamp design allows easy installation or repositioning anywhere on the shaft without marring the surface, while the integrated keyway provides secure torque transmission and superior holding power over set-screw collars. The Heavy Duty style incorporates a larger outside diameter and an oversized clamp screw to deliver up to twice the holding power for demanding applications. Available in Low Profile and Heavy Duty styles.