Had a go with my Difflock super propshaft nut socket thing, It's a load of ****e! You're better off with two 9/16" combination spanners and a 3/8" drive 9/16" socket with a wobbly extension.
It probably cheaper to buy two sets of spanners from Machine Mart than two spanners from a tool specialist, Unless you can get discount.
Nah I've got two and there both ridgid but it's the girth of the bizzniss end thats the problem it's too fat. I will surgically remove some to make it thinner and it should enter easier.