Century Drill and Tool 83805 Sonic Spline Drill Bit,1/2X11X16 in. MCD0_B0GVK96

Size: 1.3cm x 41cm Sonic Spline drill bits offer a self centering tip for precise drilling and cut 20x faster that standard masonry drills. They are made with reinforced cutting tips to minimise vibration and protect carbide from breakage and they have a double flute geometry that removes debris faster for improved cutting life.