#1 Selling Rig in the U.S.A. Great for the General Contractor. 2-1/2” square column (mast) with black oxidized finish. 6” wheels for easy mobility. Dual switch/outlet control panel with amp meter (except for CB700 models with LED amp meter). Vacuum pump for quick mounting to flat surface without drilling an anchor hole (included with combination rig). 4 leveling screws on the base. Up to 14” bit capacity with one spacer block. Slide handle allows for drilling in tight areas. Combination base is a quick change over from vacuum to anchor base. Ceiling jack helps keep the rig in place as a backup for anchoring or vacuuming the base down (used with a brace piece-2 x 4 or other material). 10” Standard Bit Capacity, 14” w/Spacers (Weka, Milwaukee). 14″ Standard Bit Capacity (CB733, CB744).