Each wrench meets the ASME performance requirements for the next size up (example: 6” wrench meets the requirements for the 8” wrench) 
Micro-serrations on the jaws provide a tighter grip on the fastener thus helping to generate 4x more torque than traditional adjustable wrenches 
Sae and metric laser etched scale allows for quick & easy determination of fastener size 
The larger knurl provides a tighter jaw fit, is easier to adjust and is less likely to bind up 
Black phosphate and lacquer finish help to resist rust and prevent corrosion for better durability 
Includes 6 in. adjustable wrench and 10 in. adjustable wrench 
Raised panel handles for extra grip and improved comfort 
Wider jaw opening than traditional adjustable wrenches allows use with a greater range of fastener sizes