Product details:

Each box-end features a 72-tooth non-reversible ratcheting mechanism that only needs a 5 degree arc to engage from tooth to tooth, letting you do more work in smaller spaces. This mechanism is then mounted to a 180-degree flexible neck that lets you position the wrench end to the angle you need to work from rather than try to angle and twist yourself to accommodate the wrench and fastener. The universal spline design allows these wrenches to work on 6 and 12-point, star, spline, square, and even half rounded fasteners with equal ease. Each double ended wrench features a combo of two different sizes giving you 10 wrenches worth of fastening power in 5 wrenches. Sizes included in the set are 8mm x 10mm, 12 mm x 14mm, 13mm x 15mm, 16mm x 18mm, and 17mm x 19mm.