8mm Metric Shaft Collar Two-Piece Split Clamp-Type, Stainless SteelFully metric, including clamp screws Can be placed anywhere on shaft Smooth bore protects shafts from damage Superior holding power over set screw type collars Stafford Metric Shaft Collars are fully metric in all specifications, including the clamping screws. 2 Piece Clamp Type Collars are designed for use on standard round shafts, hard or soft, as well as on thin wall tube or over a split hub. They can be completely disassembled and placed anywhere