WD & WL brand, well-known trademark in China, from one leading Maxpower Tool Group company. 
Industrial Quality!
Whole body drop-forged with super alloy steel for strength and durability.

Chrome plated surface for long lasting corrosion resistance.

Heat treatment body torque can exceed ASME standard 30%.

Precision nut, open and close easily.

Narrower end, easy to add pipe to increase torque, but cannot over load.

With laser metric scale.