Features:It can be used for pneumatic tools, electric tools and manual tools with hexagonal chuck, and with the auger, grinding and screwdriver bit for clamping, so as to realize multiple functions of one tool.Three-jaw collet structure, strong, stable and fast clamping forceQuickly convert your quick change hex shank driver into a drill!It can be used in the fields of craft manufacturing, DIY creation and production manufacturing.Aluminum alloy + carbon steel material, high hardness, wear - resistantSpecification:Material: Aluminum alloy, carbon steelSize: as the picture showsWeight: Approx.20g~45g/0.7oz~1.6oz Model(Optional)HexshankClampingrangeMaterialH013346.35mm0.3-3.6mmNickel-aluminumalloy+carbonsteelH013356.35mm0.3-3.6mmBlackaluminumalloy+carbonsteelH014556.35mm0.3-6.5mmBlackaluminumalloy+carbonsteelH015546.35mm0.3-6.5mmNickel-aluminumalloy+carbonsteelPackage list:1 x Hex Shank Drill Chuck