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E-Z Drill’s Model 210-4 SRA Drill is a four-gang drill designed to provide accurate concrete drilling from an easily maneuverable machine. The series consists of two other self-propelled models: the three-gang Model 210-3 SRA and five-gang Model 210-5 SRA. The compact frame design allows each drill to operate in a 4-foot patch while drilling to within 6 inches of a corner. The bits drill to a standard 18-inch depth, and each unit can be adjusted easily to drill into the center of a 24-inch slab. Adjustable spacing can be set between 12 and 36 inches, with greater width settings available through custom orders. The pneumatic drills, which are powerful enough to tow the air compressor with an optional tow-bar assembly, feature an internal regulator to prevent breakage caused by high-pressure spikes. When used with the tow bar kit, the SRA models eliminate the need for an additional vehicle.