This CRL Small Diameter Glass Drill is especially suited for detailed work such as restoration and art glass applications. The small diameter makes it handy to use on glass, virtrolite, tile, ceramic, and china. It can be used in a securely held hand drill, but like most glass drilling applications, a standard drill press is best suited for this application. The CRL2 or SDM4 are good choices when using these small diameter drills. Important Notes: Always wear the proper safety gear including gloves and eye protection when drilling glass. Work should be performed on a flat, horizontal surface. A Ground Fault Circuit Interrupter must be used when using any type of electric tool in conjunction with water or coolant. Failure to follow any of these precautions can result in operator injury.