This unique drilling machine was designed primarily to make cutouts for plug and switch receptacles. The CRL Swivel Drill Machine has a suction cup base that also acts as a coolant retainer when drilling with Diamond Tube Drills. Drill first hole, insert rubber plug, swivel drill head and drill second hole. Can also be used for drilling larger holes with tube drills up to six inches (152.4 millimeters) in diameter. Drill head has the unique ability to swing a full 360 Degrees so drilling up close to the glass edge is made easy. This also lets you use drills larger in diameter than will fit in the built-in retaining ring. Machine is powered by a 1,000 RPM, 110 VAC motor.