This Hex bit socket set is from Steel for its strength under the pressures of impact use and wear resistances, and is suitable for use on all air powered & battery powered impact tools. This hex bit socket set with oiled, black oxide for maximum corrosion resistance. Pin hole at the base of each socket for use with a locking pin for secure attachment to drive tools. Size markings have been laser etched for quick and easy identification. The style of the material box is random, Not accepting designation, and the actual product may have slight color differences or differences, which does not affect use. Color: Black Material: steel : (H5/H6/H7/H8/H10/H12/H14/H16/H17/H19) Package Contents: 10 x 1/2 inch Drive Master Impact Hex Bit Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.