Description:  
Protective sleeves free spin instead of scuffing wheels, allowing sleeves to remain in place while sockets rotate
Also safe for forward tightening of lug nuts without damage

Features:
100% Brand new and high quality.
Material: CR-MO  
Hard wearing nylon sleeves on the outside of the sockets protect the wheels    
Heat treatment chamfered ends makes the sockets to attach to the nuts easily.    
Non-slip design enforced the adhesion between the nuts and socket.    
Square (inch): 1/2"    
Size (mm): 17, 17,19, 21   

Package list:
4pcs Wheel Socket Set 17mm, 17mm, 19mm, 21mm
1 x Storage Case