MILWAUKEE SDS-Plus MX4 4-cutter drill bits

Unique 4-cutter carbide block (4×90°). For perfectly round holes and optimum anchorage;4-groove geometry, ensures maximum dust and debris extraction;Centering tip for easy centering and maximum hole accuracy;Greater amount of Carbide leads to longer life;4 breaker teeth produce micro fractures in concrete that increase speed. They pulverize the material more efficiently. 20% faster than competitors;Side chamfering of the cutting edge for greater strength in concrete. These drills are 4 times longer lasting vs. 2-cutter drills;New shoulder design that tapers as you approach the cutting edge for better dust extraction, speed and minimize friction. Up to 20% more holes per charge vs competitors;Made in Germany