Milwaukee® MX4™;;; 4-Cutter SDS-Plus Rotary Hammer Drill Bits are designed for durability and to drill more holes per charge in cordless rotary hammers. The rebar guards and a 90° 4-Cutter head provide increased life and durability in hard aggregate and rebar. while the breaker point pulverizes the material more effectively for faster drilling speeds. The variable flute allows for improved debris extraction allowing for more holes per charge in cordless rotary hammers while improving durability bit in corded and cordless rotary hammers. Additionally, MX4™;;; features a centering tip for exact spot drilling, wear mark indicator indicating when the bit no longer meets ANSI diameter requirements, and a reinforced flute for durability and minimized vibration.