CRL 3 Piece Cast Iron Rubber Base Ring Drilling Set Backer Rods & Insert Tools Perfect for dispensing low to

Perfect for dispensing low to medium viscosity materials

wipe off with a clean dry cloth

Silicon Carbide Abrasive

while the flat end removes old putty

CRL 3 Piece Cast Iron Rubber Base Ring Drilling Set Backer Rods & Insert Tools Perfect for dispensing low toCast Iron Rings with Rubber Bases Retains Abrasive Grain Slurry Eliminates Putty Dam Use these CRL Base Drilling Rings to retain the abrasive grain slurry while the drill is rotating and cutting into the glass. The cast iron rings have rubber bases to hold them securely to the glass, providing a proper seal, and allowing the coolant to mix with the grain for quick, efficient drilling. They are available in four diameters, individually or as a set.