An ideal contact between tool and hand is guaranteed through the elastomer coating and an octagonal head. All blades are of hardened stainless steel. Contents:10 screwdrivers in the following diameters 0.5 orange 0.6 white 0.8 yellow 1.0 black 1.2 red 1.4 grey 1.6 violet 2.0 green 2.5 blue 3.0 brown including two replacement blades of each size.