CRL 2-1/8" PDT Belgian Series Metal Bond Diamond Drill Diamond Countersinks Router & Grinding Bits It conforms to ASTM C920

It conforms to ASTM C920 Type S

For identifying coated surfaces

CRL Open Cell Backer Rod should be used only in vertical and horizontal wall joints

and the air space must be 9/16" or less

This CRL Fletcher® 114 Degree Replacement Wheel Unit quality wheel assembly has a steel wheel revolving on a hardened steel axle within a hardened steel shield

CRL 2-1/8" PDT Belgian Series Metal Bond Diamond Drill Diamond Countersinks Router & Grinding Bits It conforms to ASTM C920Designed for High Volume Glass Fabrication 3 8" Diamond Matrix Depth Two Mounting Styles to Choose From, Straight Shank or Belgian Thread CRL PD and PDT Series Metal Bond Diamond Drills use a special diamond and brass bond for maximum performance in glass. Metal Bond Drills offer the longest life of any type of diamond drill; 1,000 to 2,000 holes in 1 4" (6. 4 mm) glass with proper maintenance and the use of a wet Sharpening Stone to expose fresh