53PCS SCREWDRIVER BIT SET 1).Two-color plastic box 2).5pcs bit and nut socket 3 ... ).S2 steel or Cr-v steel material; 53PCS SCREWDRIVER BIT ... .5mm, 3mm, 4mm, 5mm, 6mmFinish:sanding finish4pc 50mm screwdriver bits, 2pcs Pozi: PZ1 , PZ3, 2pcs Phillips: ... PH1 ,PH3Finish:sanding finish4pcs 75mm screwdriver bits, , 2pc Pozi: PZ2, 2pc Phillips:PH2Finish:sanding ...