These elements allow constructions in up to threelevels, thus permitting almost limitless possibilitiesfor the realization of creative ideas.To avoid various corner problems or increasingstrength in the corner parts, the universal corner blockwith bold on receivers in various lengths is theanswer.In the corner block as well as in the bold on receiversa small hole is drilled to match a spring pin so theposition is determined. Easy to connect, safe and fullylocked.TheBLK-34- HD/FD34 Corner block 90º in 6 directions.