High-quality material: ball chisel file grinding heads made of high quality carbon steel, solid and durable. There are hundreds of sharp teeth around the wheel, which can be applied to most non-metallic materials. Specifications for use: 10 mm: suitable for type 100 angle grinders. 14mm - Suitable for 115/125 type angle grinders.Please check the specifications before purchase. (Maximum speed 12000) Easy to use: simply screw on for easy installation. Another great advantage of this wheel is that it can be easily attached and removed from power tools. Very quick and easy to use, it greatly improves work efficiency. Widely used: this angle grinding head mounting bit can be used for small and medium woodworking projects for engraving, carving, grinding, grooving, polishing, and is ideal for wood, fibreboard, solid wood, multi-layer board,plastic board. Note: protective gloves are required when using the angle grinder. Please make sure it is installed before use! Keep away from children.