1.Specifications: 4‑piece diamond grinder bit set in 1/8", 1/4", 3/4", 1". Shaft hole: 5/16"(8mm). Comes with hex wrenches for quick installation & replacement.

2.Premium Material: Vacuum‑brazed diamond surface delivers sharp cutting power, long service life and stable grinding performance without deformation.

3.Wide Application: Ideal for DIY grinding of regular glass and stained glass, also highly effective for shaping & finishing tiles, stone, ceramics, jewelry and other similar materials.

4.Universal Fit: Universal Compatibility - Stained glass drills suitable for glass grinders of most brands

5.Usage Tip:Always use water/coolant during grinding. Secure bits tightly with included hex key before operation for safety.