CRL 4-1/2" Glass Block Drill
CRL has designed this special drill for the demanding job of drilling glass blocks. CRL Glass Block Drill features our special sawtooth drill which has a thicker wall, and a heavier three-sided shank to fit in any 1/2" (12.7 mm) chuck. Available in a 4-1/2" (114.3 mm) size for drilling vent pipe holes. This drill is shorter in barrel length for added stability.