If you need to quickly and easily change your fastening tools, this DEWALT DWA1TS15IRB Insert Bit is the tool for you. The 1/4" hex shank fits most standard power drills. It has a Torx TR/Security bit style and a T15 point size. This insert bit features S2 steel construction with magnesium phosphate finish for added durability. It also has an overall length of 1 in., which makes it ideal for those hard to reach places. If you are looking for the best quality insert bits on the market, then look no further than this DEWALT DWA1TS15IRB Insert Bit.