hole saw kit 11pcs industrial HSS hole saw kit. hole saw kit11pcsindustrial HSS hole saw kit.Content:11pc hole saw: 19,22,25,32,35,38,44,51,57,64 and 76mm2pc quick hitch arbors:6.5mm and 11mm1pc 6.5mm pilot drills1pc 300mm arbor extension1pc ejetor spring1pc polyethylene case