9 Pcs Bi-Metal Hole Saw Set Material: Hss M3 Bi-Metal Size:19Mm(3/4″)/22Mm(7/8″)29 Mm(1-1/8″)/38Mm(1 1/2″)/44Mm(1-3/4″)/57Mm(2 1/4″) 1 Pcs Arbor:3/8″ Hex Shank,Fit Size:9/16″~1-3/16″ 1 Pcs Arbor:7/16″ Hex Shank,Fit Size:1-1/4″~8-17/64″ 1 Pcs Adapter Arbors With 1/2-20 Threads To Fit Hole Saws 5/8-18