The Stanley FatMax FMMT13034-0 is an 11mm combination wrench with an open jaw and a 12-point ring end. The anti-slip surface treatment on the open jaw provides a more positive grip on fastener flats compared to a standard polished finish, which matters when working on corroded or slightly rounded fixings where a conventional spanner would slip.

The 11mm size is less common than the metric staples of 10, 13, and 17mm, but it turns up regularly on certain plumbing fittings, imported machinery, and older European-spec equipment. Having an 11mm in the set means you are not reaching for an adjustable when one of these fasteners appears mid-job. Chrome vanadium steel provides the hardness and toughness balance needed for daily trade use.

The ring end delivers maximum torque transfer on accessible fasteners, while the open end handles restricted-access situations where the ring cannot fully engage. The compact profile at this size makes it easy to work in confined spaces around pipework and wiring.

Key Specifications: Size: 11mm. Type: Combination (open + 12-point ring). Material: Chrome vanadium steel. Surface: Anti-slip jaw treatment. Model: FMMT13034-0. Weight: 0.052kg. Dimensions: 210 x 24 x 44mm.