FastCap Speed Brace SB-21X28BL FastCap Speed Brace Counter Top Brace System-Black (21in x 28in) Brace yourself for the SpeedBrace! The SpeedBrace is full of incredible features that make it fast and easy to use.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.