Uses: Attach to rechargeable drills / impact drivers, and you can use round shank bits for work
Hexagonal shank: 0.25 inches (6.35 mm)
Chuck diameter: 0.5 inch (13 mm)
Compatible sizes: 0.06 - 0.5 inches (1.5 - 13 mm)
Compatible Devices: Cordless impact drivers, electric drills