VersaDrive MAX reamers offer a heavy duty solution for enlarging and aligning holes in thick metal plate (e.g. 20mm and above) or at large diameters.Specially designed cutting geometry and a unique 20mm shank mean they can be used with high torque Impact Wrenches and the most powerful Magnet Drills for superior performance and portability, allowing the job to be completed onsite and not removed for reworking. Features & Benefits- Ideal for steel erection & bridge work- Ideal for modifying & enlarging holes- Use with high torque Impact Wrenches & high power, low speed Magnetic Drills- Unique 6 flute design for a faster, smoother cut- Prepare holes ready for TCB & friction grip bolts- Use with 1/2", 3/4" & 1" drive high power Impact Wrenches (1" drives require step-down adapter)