Professional spanners for commercial or occasional use. This is a 10-piece ratchet combination wrench/spanner set with dual-marked, metric and imperial sized spanners. The spanners range from 10mm – 19mm or 3/8in – 3/4in. Each is a combination ratchet spanner, meaning one end is open-ended and the other is enclosed, making them suitable for both metric and imperial sized bolts/nuts. The spanners feature a 72-tooth ratchet mechanism, allowing them to work in 5-degree increments, which is ideal for tight, restricted areas. This design also reduces the chance of slipping, enabling greater force to be applied. The ratchet is reversible by simply turning it over 180 degrees. The spanner heads are bi-hex (12-sided) for a more solid grip on nuts and bolts. They are mirror-polished and finished to prevent rusting and corrosion, offering high torque capacity. The set includes the following sizes: 10mm (3/8in), 11mm (7/16in), 12mm (15/32in), 13mm (1/2in), 14mm (9/16in), 15mm (19/32in), 16mm (5/8in), 17mm (11/16in), 18mm (45/54in) and 19mm (3/4in). The set comes in a tool roll for easy storage, transportation, and identification.