The heart of the SpeedBrace is the 1-1/2" x 1-1/2" notching system that makes for fast and easy alignment after installing a level cleat along the wall. 1,000 lbs. load capacity per pair (on 16" centers). Perfect for your shelves, countertops & workstation. Sold individually. Please note the smallest 5x8 speedbraces feature a 1-1/2"x 1/2" notch for a 1x2 lumber wall cleat.