HOLE DOZR BM HLSW 3-1/4" *Brand Name: Milwaukee *Sub Brand: Hole Dozer *Diameter: 3-1/4 in. *Material: Bi-Metal *Product Type: Hole Saw *Number in Package: 1 pc *Cutting Depth: 1-5/8 in. *Arbor Included: No *Length: 1.9 in. *Shank Diameter: 1/4 in. *Usage: Cutting Holes *Compatible Arbors: Arbors with 1/2 in.- 20 thread *Quick-Change System: Yes *Package Type: Shrink Wrap *RPM Aluminum: 155 *RPM Cast Iron: 70 *RPM Mild Steel: 105 *RPM Stainless Steel: 50 *Discovery ACC, CON,NBR, SUP