Splines are available in double 3/8”, ½”, and ¾” square, as well as ¾” round. Double 3/8” square horizontal splines are made with clamp plates on each end for attachment to verticals and can be used to attach box rack stampings. Construction angles are 1” x 1” with 9/32” diameter wholes on 1” centers. These items can be made to specific length requirements.