Masterdrive flexible jaw coupling. For use with 8 HP or less, rotating equipment. 1/2" 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 L099N for Buna-N or L099H for Hytrel. Coupling part number L099x1/2".