Home Products Power Tool Accessories Masonry Drill Bits Spline 4-Cutter Masonry Drill Bit 5/8″ Cutting Length 24″ Overall Length 29″ Spline 4-Cutter Masonry Drill Bit 5/8″ Cutting Length 24″ Overall Length 29″ (83903) 4 cutter spline 4-cutter tip prevents seizing while drilling in reinforced concrete Crushes 20 times faster than standard masonry drills Find a Retailer