Solid, single-piece premium alloy steel construction with #2 square drive magnetic tips. Quick-change compatibility for fast and easy bit changes. Features a 6.3mm (1/4″) hex shank for use with standard chucks of 9.5mm (3/8″) diameter. Overall lengths 76mm (3″) and 152mm (6″). Solid, single-piece premium alloy steel construction with #2 square drive magnetic tips. Quick-change compatibility for fast and easy bit changes. Features a 6.3mm (1/4″) hex shank for use with standard chucks of 9.5mm (3/8″) diameter. Overall lengths 76mm (3″) and 152mm (6″).