8406 Makita dry diamond core drill is specifically designed for use with core drills and can drive a core up to of up to 152mm diameter. The 8406 drill has a torque-limiter which disengages the clutch when the core jams. When using diamond cores ensure that the 8406 is set to the rotary only mode. Complete with chuck key, side handle and carry case. Drilling Capacity 30mm (Wood). Drilling Capacity 13mm (Metal). Drilling Capacity 20mm (Masonry). Drilling Capacity 152mm (Diamond Core). No Load Speed 0-1500rpm. Weight 3.7kgCarry Case.