The Stanley FatMax FMMT13039-0 is a 16mm combination wrench with an open jaw and a 12-point ring end. The anti-slip jaw treatment provides a grip advantage over standard polished jaws, which matters at this size where the forces involved in loosening seized or corroded fasteners are substantial.

16mm covers M10 bolts with certain head profiles and M12 bolts with standard hex heads. These appear on heavier structural brackets, machine mounting bolts, automotive suspension components, and industrial equipment. The 16mm wrench bridges the gap between the lighter metric sizes used in general fixings work and the heavier sizes used in structural and mechanical applications.

The wider 30mm jaw width at this size provides more material behind the working surfaces, adding stiffness and preventing the open end from spreading under heavy load. The 12-point ring engages in 30-degree increments for repositioning in restricted spaces. Chrome vanadium steel construction provides the toughness needed for sustained use on heavy fasteners.

Key Specifications: Size: 16mm. Type: Combination (open + 12-point ring). Material: Chrome vanadium steel. Surface: Anti-slip jaw treatment. Model: FMMT13039-0. Weight: 0.12kg. Dimensions: 267 x 30 x 44mm.