- Unit-Fit box ends drive SAE, Metric, External Torx, Spline, Square, 6pt & 12pt Fasteners plus Rounded Hex
- SAE sizes: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4"
- Metric sizes: 8, 10, 11, 13, 14, 16, 17, 19mm
- High polished chrome vanadium steel construction
- 72 gear teeth needs on 5 degrees to turn a fastener
- (4) double sided reversing box ends drive 34 sizes and styles of fasteners
