Material: The bit sharpener is made of PP material, which is sturdy, wear resistant, not easy to deform, and has a long service lifeDirectly Replace: Grinder bit sharpener, high reliability and performance, you can directly replace old or damaged partsHigh Performance: Professional bit grinding attachment, sturdy and stable, with grooves of various sizes, can quickly fix the grinder bit so that you can easily grind different types of grinder bit and improve your work efficiency (model hole 3 4 5 6 7 8 9 10 11 12 mm)Easy To Install: The grinder attachment is easy to use and can stably fix the grinder bit during the grinding process, suitable for long term useEasy to carry: Bit sharpener, compact structure, very suitable for carrying and storage. Suitable for grinder bit and angle grinders of various specifications Specification: Material: PP Size Chart: 12.5 cmx11.5 cm/4.92 inchx4.53 inch Package Includes: 1x Drills Bit Sharpener Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.