Adjustable Wrenches Home / Adjustable Wrenches Adjustable Wrenches (Max Power) Standard: ISO 6787 (dimensions, jaw clearance, marking)Forged with high grade steel, and heat treated to give long trouble free serviceLengths: 150 / 200 / 250 / 300 / 375 / 450 mm (jaw 0–30 mm typical) Adjustable Wrenches With Sleeve (Max Power) Standard: ISO 6787 (dimensions, jaw clearance, marking)Forged with high grade steel, and heat treated to give long trouble free serviceLengths: 150 / 200 / 250 / 300 / 375 / 450 mm (jaw 0–30 mm typical)