CENTURY'S WIRE BRUSHES - DRILL CUP WIRE BUSH IS MADE FROM HEAT TREATED STEEL WIRE FOR SURFACE CLEANING OF LARGE FLAT SURFACES. 1/4"" QUICK CHANGE SHANK. IDEAL FOR REMOVING RUST PAINT AND WELD SPATTER FROM METAL PARTS LARGE FLAT SURFACES AND FITTINGS PROVIDING PROFESSIONAL RESULTS EFFECTIVELY CLEANS AND DEBURRS BOTH THE INSIDE AND OUTSIDE OF PIPES VALVES AND OTHER METAL FITTINGS WITH PRECISION CONSTRUCTED WITH HEAT-TREATED STEEL WIRE FOR EXTENDED LIFESPAN AND DURABILITY DURING HEAVY-DUTY CLEANING TASKS FEATURES A QUICK-CHANGE SHANK FOR FAST SECURE ATTACHMENT TO DRILLS IMPROVING EFFICIENCY ON THE JOB