Each screw has a different head recepticle design. One is an allen with a post in the center and the other a star with post at the center. The money will net you two wrench's, 8 screws with two different heads, all tapped in the hub ready to go. I feel it is less security and more safety. However it would be a pain to steel my wheels.
Worth the 40 bucks...............
Great product!
