FOX BELLCRANKS Designed for use with control line models, the Fox Bellcrank is formed from heavy-duty aluminum alloy sheet. It will stand a pull test of 50 - 60 lbs., making it suitable for heavier scale models. The non-binding center pivot will not bind the bellcrank when it is bolted down tightly. It has three pushrod position holes and comes in two sizes. * 3 3/8" long x 1 5/16" wide.