General description Applications: The adjustable nut sockets are designed to fit and work with hydraulic cylinders in construction scenarios, agricultural equipment, and vehicles with packing nut fittings. Technical specifications Large adjustable nut key diameter range: 5.1 cm to 15.2 cm Large key reversible for pin holes: 6.35 mm and 5/16" Large key drive: 1.9 cm square Small adjustable nut key diameter range: 2.5 cm to 9.5 cm Small key reversible for pin holes: 1.2 cm and 2.2 cm Small key drive: 1.2 cm ratchet Material: High-quality steel with black finish