18mm Metric Face Mounting Shaft Collar One-Piece Split Clamp-Type, SteelUniversal tapped face holes for multiple mounting options Smooth bore protects shafts from damage Superior holding power over set screw type collars Face Mounting Shaft Collars have universal tapped mounting holes, allowing multiple options for mounting components to the collar. 1 Piece Clamp Type Shaft Collars are for use on standard round shafts, hard or soft, as well as on thin wall tube or over a split hub. They are precision machined, non