... '' 3)sealing:metallic seal 4)processing:forging 5)MOQ:1pc Fitting1)6 1/2''2012 Hot oil rig drill bit 2) ... Tricone Bit3 7/8 ,5 1/2, 6 1/27 7/8,8 1/2,8 3/410 5/8,12 1/413 3/4, 17 ... Tricone Bit3 7/8 ,5 1/2, 6 1/27 7/8,8 1/2,8 3/410 5/8,12 1/413 3/4, 17 ... blades,4 blades,5 blades,6 blades)5 1/2, 6 1/27 7/8,8 1/2,8 3/410 5/8,12 1/413 3 ... /4, 17 1/2,22 ...