Bi-metal Hole saw set

Hole saw 12pcs set
Size:20mm(25/32"),22mm(7/8"),25mm(1"),29mm(1-1/8"),32mm(1-1/4"),35mm(1-3/8"),38mm(1-1/2"),44mm(1-3/4"),48mm(1-7/8"),50mm1-31/32‘）
1 pcs arbor：1/4“ Round Shank，Fit Size：9/16”~1-3/16"
1 pcs arbor：7/16“ Hex Shank，Fit Size：1-1/4”~8-17/64"
Packed by Aluminum case