Amish-Cox Chain Strap (A-C Strap)Amish Cox Chain Strap (A C Strap) The Amish Cox Chain Strap, or A C Strap, is another unique tool for 5 8 chain work. Named after Agent David John Smith(the Amish beard) and Stephen Cox, this chain strap was conceptualized from our looper strap tech which was designed for easy chain loading on the squat and bench, but not usable on the deadlift. For years, we have had variations , both metal and webbing, that never seemed quite right either being