LEGO's Technic Panel 3 × 3 Triangle, part 6613, modelled after LDraw's drawing: two faces on a right-angled triangle, 7.2 mm apart outside and open between them along the long side and the legs, round a pin hole through a boss at its corner that stands 0.4 mm proud each side. Between the faces each leg carries a block a module from the corner, bored with an axle hole across the leg in the panel's plane and slit at its far end into a clip, and each rounded tip a hooked clip. The pin hole takes a Technic pin, the axle holes an axle.

One of the LEGO Technic Panel family.