Basetech drill chuck with hex shank 0.5 - 6.5 mm (820708) product description: Basetech drill chuck with hex shank 0.5 - 6.5 mm (820708) device type workshop and accessories manufacturer Basetech manufacturerrrrrr. 820708 clamping range 0.5 - 6.5 mm special feature Makes the cordless screwdriver a drill Suitable for all power tools with bit mount 6.35 mm (1/4 inch)