CRL 4-1/2" Suction Base Drilling Round Ring Glass Abrasive Tools There should be no metal

There should be no metal or wood to glass contact

The combined Primer and Adhesive two-step application offers handling strength in 10 seconds

and applies easily with a standard caulking gun

and its color is stable to ultraviolet exposure

the CRL Listo® Mechanical Pencil is a great choice

CRL 4-1/2" Suction Base Drilling Round Ring Glass Abrasive Tools There should be no metalInstantly Creates a Coolant Dam Slanted Walls Helps Stop Splashing Cleans Easily Won't Rust! Use our CRL Suction Base Drilling Rings for drilling glass whenever you use coolant or carbide grain. Made of a special rubber compound that wont break the glass if accidentally dropped on it. Easy to use, just wet the base with coolant or glass cleaner and press onto the glass. Four sizes of round rings, plus an oval shaped ring for drilling dual outlets.