Climax Metal, M2C-Series: Metric 2-Piece Clamping CollarDesign fully engages the shaft without marring or other damage. Two-piece collars are easily installed where major disassembly would otherwise be required. Greater axial holding power than set screw collars. Effective on hard and soft shafts. Bore Sizes 3mm to 80mm in Stainless Steel and Black Oxide Steel.