Drillpro 10pcs Rotary Steel Wire Wheel Brush Cup Tool Shank for Dremel Drill Rust Weld 1 1 For Dremel. 10pcs Rotary Steel Wire Wheel Brush for Dremel Drill Rust Weld. Shank Length: 40mm (1.57" approx). Shank Diameter3.17mm (0.12" approx). Note: NO Retail Box. Packed Safely in Bubble Bag.