--using for tungsten carbide cutting tools; --virgin raw material --OEM is available British-systemmetric-systemBSM-52M0411M03BSM-51M0613M03BSM-51M0613M06BSM-2M0818M06BSM-4M1020M06BSM-5M1325M06BSM-6M1629M06You can also choose the course tooth products carbide rotary burs(alloy,flat headed conical )