DEWALT DWA4973 Aluminum Oxide 3/8" x 1" Hp Grinding Pt Material Aluminum oxide Shank Type Hex Brand DEWALT Item Dimensions LxWxH 0.44 x 4.75 x 1.88 inchesDimensions Dimensions : 1.9' 4.7' 0.3' 1/4" hex shank for easy bit changes High performance aluminum oxide tip for long life For deburring, shaping and grooving For use with ferrous metal .