Yup, it bolts straight to a 6 bolt momo boss, and straight to a momo 6 bolt wheel.
It also comes with 6 allen head bolts (to attach it to the boss) and you use the original 6 bolts to attach the wheel to the other half of the QR.
Note it actually has 12 holes, in two different pcd's, so it will fit both momo and nardi steering wheels/boss kits.
To release it you need to push in the silver button and slide the ring back towards the steering wheel, this releases the 10 ball bearings that hold the wheel in place - it takes both hands to do, so it's not likely to come off by accident.