CRL 1-1/2" HBT Series Belgian Thread Electro-Formed Diamond Drill Glass Tappers & Running Tools Always wear the proper safety

Always wear the proper safety gear including eye protection when using these drills

or rainbows

Fits All 5/8"-11 UNC Spindles

Aggressive Diamonds Grind Fast

CRL 1-1/2" HBT Series Belgian Thread Electro-Formed Diamond Drill Glass Tappers & Running Tools Always wear the proper safetyFor Fast Cutting, High Production Runs Extended Work Life Two Mounting Styles to Choose from Straight Shank or Belgian Type These CRL Electro Formed Diamond Drills are thin walled, with a 1 2" (12. 7 mm) deep multi layer of diamonds and bonding matrix designed for high speed, high production drilling. These drills give outstanding results when exacting conditions are met. The CRL DCD Series features an extra long 1 3 8" x 3 8" (35 x 9. 5 mm) diameter