So, this was my second DiMarzio strap. Everything basically is the same, but there is a one thing, that differs from others - end of strap has plastic rings, compared to other DiMarzio clip-locks.
DiMarzio clip-locks are the best straps for guitar on market, but I liked the white model far more better than this one.
Instructions are easy, includes two screw sets, you just need a good screwdriver and everything will be fine.
And just buy one of these (or the other model) and you won't be thinking about your guitar falling on the floor in the middle of gig.
Buy 1 clip-lock set and then just buy straps separately, you won't need strap-locks no more (only the strap itself), because you have them already installed on your guitar!