uxcell Electric Drills 18mm Cylindrical Head Felt Bobs 3mm Polisher Shank 10pcs Product Name : Felt Bob;Density : Hard Head Size : 18 x 22mm / 0.7" x 0.9" (D*L);Shank Diameter : 3mm / 0.1" Total Length : 48mm / 1.9";Material : Felt, Metal Color : White, Silver Tone;Weight : 50g Package Content : 10 x Felt Bobs