ITEM NAME:Security Tamper Proof Bit Set 33Pc Star Spanner Wing Screwdriv Magnetic 3C.Spanner Sizes: 4mm/ 6mm / 8mm / 10mm. Applicable for installing in electric screwdriver, hand screwdriver, electric drill and other tools. They are manual head screwdriver. Tri Wing Bits: 1mm / 2mm / 3mm / 4mm.
