Masterdrive flexible jaw coupling. For use with 4 HP or less, rotating equipment. 5/8" bored to size. Interchanges with Lovejoy, Martin, T.B. Woods and others. Jaw couplings are sold individually and require 3 parts for the complete assembly. Order the appropriate coupling halves separately along with spider insert L090N for Buna-N or L090H for Hytrel. Coupling part number L090x5/8".