Comes with a convenient 0.2 inch (4 mm) bar mounting hole to prevent the box from tilting. (No screws needed) Comes with a stat. To use the stat, remove the knockout on the back of the box to use. ◆Paint price cover (one touch type) compatible product; Medium square (shallow type). Side knockout: 22, 22 (25, 25, 25) x 4; Pictures are representatives.