DIY Supplies:WoodworkingDescription:1. Material: stainless steel post + rubber wheel2. Size: rubber wheel diameter 12.7/6.35MM optional, stem shank diameter 3.15/2.3MM optional3. Features: cross-section screw, uniform force; stainless steel material, high hardness, not easy to rust; a variety of specifications, to meet different operational needs.4. Function: sanding tool for connecting sandpaper ring5. Installation method: put the sandpaper ring on the rubber pole and gently rotate the screw with a screwdriver to expand the rubber piece so that the sandpaper ring can be fixed on the pole.

http://olla.gr/6-pcs-rubber-wheel-connecting-rod-sandpaper-ring-fixing-rod-without-sandpaper-ring-rubber-rod-diameter-6.35mm-shank-diameter-2.3mm/