The four fluted spiral shaft has improved dust removal resulting in less bending stresses

M18 Batteries

Rating: 120V AC / DC

Use it to cut beams

Milwaukee 49-22-4105 Hole Saw Kit Saw Stands The four fluted spiral shaft19 Pc Master Electrician's Ice Hardened Hole Saw Kit The Milwaukee Ice Hardened 49 22 4105 Hole Saw Kit utilizes a proprietary cryogenic hardening process that improves upon traditional heat treat processes. Unlike surface coatings that wear away, cryogenics harden to the core by minimizing soft metal (austenite) and creating more hard metal (martensite). The result is a product that is more consistently hard throughout, resulting in life up to 50%