100 pcs/box Wool felt mounted grinding point MIX--- 10 pieces * 10 kinds Other options --- 100 pieces * 1 kind Product Material: Wool felt, Galvanized ferric handle Size: Dia. 1/6”, 1/5”, 1/4”, 1/3”, 2/5”; Shank diameter 1/8" Application: Felt bobs are made from the finest wool and materials. Used with polishing compounds to produce a high surface finish on all dies and molds. Installed on die grinder, dremel rotary tool, apply to all metal material and other non-metallic products polishing, surface fine finishing.