Milwaukee Diamond Coring Rigs - Contractor Plus Series  Lightweight, portable coring stands for the contractor with heavyweight applications. Cast aluminum base with 4 leveling screws for fast accurate leveling adjustment. Durable precision-ground 2-1/2” steel column 43-1/2” high. Rear mounted rack and pinion feed. Jackscrew for ceiling and backwall bracing. Reversible feed handle. Locking carriage. Heavy-duty, solid rubber 5” wheels. Universal motor adapter plate.   4115-22 Small base stand with vac-u-pump assembly, vacuum pad assembly, meter box and diamond coring motor.