Milwaukee 49-56-5660 2-1/2” Diamond Plus Hole Saw Choose Milwaukee 49-56-5660 2-1/2” Diamond Plus Hole Saws for up to 10X longer life when cutting tile, stone and glass. Diamond MAX™ Hole Saws deliver best-in-class performance, with higher grade diamonds for maximum heat and fracture resistance. An improved braze provides superior diamond retention when cutting hard, abrasive materials. The One-Piece Hole Saw has a 1/4” quick change hex shank and features a large slug ejection slot. Designed as the single cutting solution for all tile, stone, and glass applications, Diamond MAX™ offers the lowest cost-per-hole on the market.