Material: Bi-metal Hole saw size:3/4 (19mm),7/8 (22mm), 1- 1/8 (29mm),1-3/8 (35mm),1-1/2 (38mm),1- 3/4 (44mm),2 (51mm),2-1/4 (57mm),2- 1/2 (64mm) 1Pcs Arbors：1/4 Round Shank ,Fit Size:9/16 ~1-3/16 1Pcs Arbors: 7/16 Hex Shank ,Fit Size:1- 1/4 ~8-17/64

7Pcs Bi-metal hole saw set Size: 19mm(3/4 ),22mm(7/8 ),29mm(1- 1/8 ),32mm(1-1/4 ),35mm(1-3/8 ) 1 Pcs adapter：1/2 -20 threads to fit hole saws 5/8 ~18 thread 1 pcs arbor：3/8“ Hex Shank，Fit Size：9/16”~1-3/16 Packed by doulble blister