The telescopic extending lever of this wheel brace is absolutely fine, and gives plenty of leverage; however the design of the double ended sockets is poor. The rebate in the centre intended to take the 1/2" square drive of the lever just isnt deep enough, so when you push the socket fully onto the wheel nut it pushes the lever square drive back out again, such that the lever wobbles about like a stick in a bucket. Consequently you either end up chewing up the sockets, or even worse the wheel nuts themselves, and you get the feeling that the brace is going to slip off the nut at any moment and take the skin off your knuckles. When used with one of my own sockets, the lever worked fine though.
This wheel brace is manufactured by Brookstone for Unipart, and several other vendors seem to be selling the same item on Amazon.