1-Bit quality used bit but good quality 2-API or ISO 9001:2008 ... relationships with you in the near future we can provide used drill bit but good quality.we also give High price ... Payment Term T/T or L/C at sight MOQ 1 Piece Supply Ability 1000 Pieces/month Delivery Time within 7 ... work days SizeBit TypeIn.mm6152.4517G, 537G, 617G, 637G6 1/2165.1517G, 537G7 7/8200.0517G, 527G, 547G, 617G, 627G ...