8-Piece Versatile Combo - Includes 2x 4inch Knotted Wheels, 2x 4inch Coarse Crimped Wheel, 2x 3inch Knotted Cups & 2x 3inch Coarse Crimped Cups. Mix sizes for efficient rust/paint/ removal on any . Industrial-Grade Carbon Steel - Both wire wheel brush and cup brush are made of high-quality material, 0.02inch knotted & 0.014inch crimped wires with dual steel reinforcement plates. Withstands 12,500 RPM for heavy-duty grinding without wire breakage. Unmatched Safety & Durability - internal steel plates lock wires in place, preventing hazardous fly-offs. Engineered for long-term use on weld scale, spatter, and stubborn . Universal 5/8inch-11 UNC Arbor - Fits all 4-1/2inch angle grinders. No adapter needed - screw on and start working in seconds. Pro Results for All Skill Levels - Perfect for metal prep, auto restoration, or DIY projects. Removes rust/paint 3X faster than manual tools while minimizing damage. Color: Red Material: Metal Package Contents: 1 set * thread mill Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.