A high quality TCT Carbide YG11 hole saw with carbide tips for fast hole making in most materials. Cuts more than 5 gr faster than traditional bimetal hole saws and has a long service life. Cuts in: wood, chipboard, MDF, laminate, plastic, plaster, lightweight concrete, leca, fiberglass as well as tiles and stone materials up to a hardness of MoHS 6. Not to be used in steel and metal materials. The hole saws have standard thread and driver holes. NOTE! Does NOT fit in standard hole saw holders with SHORT center drill, because the HM hole saw is deeper than standard bimetal. Use special holders with long center drill, or replace the short center drill in the standard holder with a longer one. Delivered without center drill and adapter. TCT = Tungsten Carbide Tipped