SKmoon 5pcs Damaged Screw Remover Set-Easily Remove Stripped or Damaged Screws-Stripped Screw Removers Screw: 0#, 1#, 2#, 3#, 4# Materials: High Speed Steel4241(HSS4241) Handle: hex shank 1/4 '' (6.35MM) Surface treatment: Nickel plating Suitable for with the joint or chuck an electric power tool, and suit for remove the screw or bad nut screw on a hard wood.