Tolsen 5pcs Black Gold Step Drill Bits Set 75879

• hss, hardened •contains: 1/4′′ – 1-3/8′′ x 10 steps 3/16′′ – 7/8′′ x 12 steps 1/4′′ – 3/4′′ x 9 steps 1/8′′ – 1/2′′ x 13 steps 3/16′′ – 1/2′′ x 6 steps •titanium coating surface •packing: aluminium case with color box