Retrac button drill bit china factory and suppliers ...
Retrac button drill bit. Material: Tungsten carbide tips and steel Process: Forging Face type :Drop center 、Concave Diameter(mm):43-115mm Thread Type:R22 R25 R28 R32 T38 T45 T51 Button shape:Hemispherical Buttons Parabolic button Conical button Ballistic button
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