Climax Metals 1C-062X10 Steel One-Piece Clamping Collar with 10"-32" x 1/2" Set Screw, Black Oxide Plating, 5/8" Bore Size, 1-5/16" OD (Pack of 10) Effective on hard and soft shafts Design fully engages the shaft without any marring Provides 360 degree of clamping force Easily installed where major disassembly would otherwise be required Black oxide provides some corrosion resistance