9 Piece Bi-Metal Hole Saw Set

9 PCS BI-METAL HOLE SAW SET 1. Cutting edge: M3 HSS 2. Matrix material: 65Mn 3. Cutting depth: 38mm 4. For cutting metal 5. Packed by plastic box 1. 6 Hole saws: 3/4", -3/4" , 2-1/4" 2. Mandrel adaptor 3. 1/4” Mandril (3/8” – 1- 3/16”) 4. 7/16” Hex (1-1/4” – 6”)-