Anvil-Strut™ Angle Fittings and Connectors are designed to fit with all Anvil-Strut™ 1-5/8 in wide channels. Unless otherwise noted, Anvil-Strut™ Angle Fittings and Connectors are manufactured from 1/4 in thick carbon steel, 1-5/8 in wide, all holes are 9/16 in diameter, spaced 1-7/8 in on center and 13/16 in from the end.