2pcs Double Split Shaft Collar for 20mm Shaft Set Screw Clamp-On Collars, 40mm OD, 12mm Width, for Stoppers, Position, Hold Timing Pulleys, Machine Tools, Industry, Anodization 20mm Bore auspowers_batchfour each expanding to 1 1/8

each expanding to 1 1/8 inchesExterior "extra" pocket is perfect for holding pens

SAFE and EFFECTIVE: Improve your practice by using blocks to maintain proper alignment

From the Manufacturer Since 1923

300g (including batteries)

includes all necessary installation components and instructions

2pcs Double Split Shaft Collar for 20mm Shaft Set Screw Clamp-On Collars, 40mm OD, 12mm Width, for Stoppers, Position, Hold Timing Pulleys, Machine Tools, Industry, Anodization 20mm Bore auspowers_batchfour each expanding to 1 1/82pcs Double Split Shaft Collar for 20mm Shaft Set Screw Clamp On Collars, 40mm OD, 12mm Width, for Stoppers, Position, Hold Timing Pulleys, Machine Tools, Industry, Anodization Product Features Size Fit for Shaft: 20mm 0. 79inch, Outer Diameter: 40mm 1. 57inch, Width: 12mm 0. 47inch. The set screw ring is a ring shaped device. They can also be used as spacers between positioners, mechanical stops and other components. Material Made of quality 6061