Stained Glass Diamond Grinder Bit for Head Tools Stain Glass Tools & Supplies for Glass Grinder 1 Inch 3/4 Inch 1/4 Inch Features: OOTDTY The drill bit is chrome-plated and hardened to improve performance, strength and durability. 3 pieces of diamond grinding bits in 3 sizes, namely, 1 inch, 3/4 inch, 1/4 inch, along with 3 matching allen wrenches, different sizes and combination to fully meet your DIY use. Make the glass grinding faster and help the work to be completed more efficiently, which are really practical and necessary tools in your Stained glass drills are suitable for forming and drilling of hard materials such as ceramic tiles, glass, colored glass, stone, etc. Made of quality metal material, and the surface is plated with diamonds, , high strength, and long life. Specifications: Material: metal+diamond Size: 1 Inch,3/4 Inch, 1/4 Inch Package Includes: 3X Diamond Grinder Bit Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. _x000D_ _x000D_ _x000D_