The thing that bolts into the lug bolt holes is an "anti-torque" tool. It keeps the brake drum from turning when you try to loosen or tighten the 36mm nut. A 3 or 4 foot section of strong angle iron will work. Just drill holes in it so you can bolt it to two adjacent lug bolt holes. Bolt it on so that one end is resting against the ground and the drum can't turn as you loosen the nut. If the nut hasn't been off in a while, it will be SUPER tight! :shock: It torques to two hundred and something foot pounds . . . and time and heat and rust have a way of adding to the tightness. If the nut has been off in past couple of years, and wasn't way overtightened when it was installed, you may not need the anti torque tool . . . if you have a good emergency brake. With the car sitting on all fours, put it in gear, put on the e-brake, block the wheels and see if you can break the nut loose without spinning the wheel.
I've got a couple of 36mm sockets and you're welcome to borrow one, but mine are 1/2" drive. It's best to have one for a 3/4" drive and have a good 3/4" pull handle . . . and a 4 foot section of pipe for a cheater bar. For the anti-torque tool, I've used a section of an old bed rail.