12-piece set of general-purpose needle files; perfect for toolmakers, jewelers, craftspeople and hobbyists High-quality chromium alloy steel construction with a #2 Single Cut Swiss pattern 12 file sizes: warding (flat), round, 3-square, square, crossing, oval, half-round, knife, barrette, slitting, joint-round edge and equaling (mill) Ergonomic handle, with contoured fingertip swivel, allows greater pressure to be applied to blade Precision locking screw chuck holds files securely in place