The synrock inset system is designed to be very easy to set up. Bolt-on insets require a precise alignment of a t-nut in a backing plate. This is a royal pain if you want to make a wall with lots of insets. Our insets DON'T require a T-nut! Holds screw onto a scrap piece of plywood on back of wall with 2x4's as spacer between wall and backing plate for proper depth.
Instead of needing one backing plate for each hold, you can use a larger scrap of plywood which can serve as the backing plate for several insets.

We reccomend clustering insets close together so you can use 2 of them as pinches

Backing plates don't have to be plywood. If you just want to an a few insets you can use scrap pieces of 2x4's as the backing plate for 3-inchers and 2x6's as the backing plate for 4-inchers.
An inset wall is really best without any bolt-on holds. If you want to make an entire wall with insets or convert an existing wall, screw an entire sheet of plywood on front of your wall with a few 2x4's as spacers. With this system, everywhere you drill with the hole saw is a place you can fit an inset. Swiss cheese your wall with pockets everywhere! Below - we build an inset wall from scratch.
Layer 1: OSB and scrap plywood form the "backing plate" that the insets will screw on to. Wall is mostly vertical with a slightly overhanging feature.
2x3's are screwed onto the lower layer of plywood and OSB to provide the proper depth for the insets when you add the second layer of 3/4 inch plywood.
After the top layer of plywood is screwed on to the 2x3 spacers all that's left to do is drill 3, 4, or 6 inch holes with hole saw and climb on the insets.
See what it's like to climb on this thing >>>>>