Home Products Power Tool Accessories Masonry Drill Bits Spline 4-Cutter Masonry Drill Bit 5/8″ Cutting Length 31″ Overall Length 36″ Spline 4-Cutter Masonry Drill Bit 5/8″ Cutting Length 31″ Overall Length 36″ (83904) 4 cutter spline 4-cutter tip prevents seizing while drilling in reinforced concrete Crushes 20 times faster than standard masonry drills Find a Retailer