Milwaukee® Ice Hardened™ Hole Saw, Series: Hole Dozer™ 49-56, 3-1/4 in Dia, 1-5/8 in Cutting Depth, 4, 1-7/8 in Overall Length, Cobalt Bi-Metal Cutting Edge, Carbon Steel Body, Toothed Cutting Edge, 155 /70/105 /50 rpm, 7/16 in Chuck, Hex Shank, Use Arbor: 49-56-7210, 49-56-7240, 49-56-7250 and 49-56-9100 Quick-Change Arbor, White, Applicable Materials: Aluminum, Cast Iron, Mild Steel, Sheet Metal and Stainless Steel
Ice Hardened Cryogenically Treated For Up To 50 PCT Longer Life; Optimized Tooth Form For Up To 2X Faster Cutting; Wide, Angled & Offset Slots For Easy Plug Access; Bi-Metal Construction With 8 PCT Cobalt For Increased Wear Resistance; Works With The Following Arbors: 49-56-7240, 49-56-7250, 49-56-9100, 49-56-7055, 49-56-7040, 49-56-7140 & 49-56-7150; Rpm Mild Steel: 105 RPM; Rpm Stainless Steel: 50 RPM; Rpm Cast Iron: 70 RPM; Rpm Aluminum: 155 RPM
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