The 210B-2 SRA is a two-gang drill designed to provide accurate concrete drilling from an easily maneuverable machine. This unit is ideally suited for lane additions, airport work, and full depth repair projects. The compact frame design allows each drill to operate in a 4-ft patch while drilling to within 6 in. of a corner. The bits drill to a standard 18-in. depth, and can be adjusted to drill to the center of a 24-in. slab. E-Z Drill Inc.