The open-end grip improves the wrench's grip on nuts and bolts, and the geometry reduces rounding and stripping. Ink-filled size labels provide easy size identification and quick distinction between SAE and metric sets.Milwaukee Hand Tools Metric Combination Spanner 15 Piece Set supplied in an optimised storage set in a tray for easy storage in tool cabinet drawers. 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm. In stock & ready for immediate dispatch. Check out our store for more premium quality products.