Shank adapters, couplings, extension rods, threaded cross bits and threaded button bits belong to threaded drilling products. Shank adapter is used for transmitting power between drill machine and drill stems. One end is to connect drill machine, another end is to connect drill stems, by this way, the power from drill machine is transmitted to drill bits, and finally the rocks are cut. In the world, there are different drill machines, so different shank adapters are available, like atlas copco, tamrock, ingersoll rand, etc. Also for the same drill machine, due to different applications, the shank adapters can be different length and different threads. Maxdrill shank adapters are compatible tabert, Mitsui, seco/secan, secoma, tamrock, tokyo riuki, toyo (3) thread: r32, r38, t38, t45, t51 (7)productivity: 2000pcs/month Package: in wooden case or in bundles.