Effective on hard and soft shaftsDesign fully engages the shaft without marring360 degree clamping forceEasily installed where major disassembly would otherwise be requiredT316 stainless steel is highly effective in corrosive environmentsSpecification: locking device: Clampscrew / locking style: Hex Socket Cap Screwconstruction: Two Piece - Splitfinish: Plainbore type: Plainscrew material: 316 Stainless Steelinside diameter: .6250 inscrew size: 10-32 x 1/2 inoutside diameter: 1.3125 inpart weight (oz.): 1.8 ozwidth: .4375 inharmonization code: 8487.90.0080material: Stainless Steel - 316type series: Cadditional details: Effective on hard and soft shafts - Design fully engages the shaft without marring - 360 degree clamping force - Easily installed where major disassembly would otherwise be required - T316 stainless steel is highly effective in corrosive environments.