Our eBay Store About Us Contact Us Add to Favorite Sellers 50 Series – L Jaw Shaft Coupler Half 1/2″ Bore, OD 1-5/64″ & Length 1-23/32″ 21.95 Couplings are compatible and interchangeable with LOVEJOY & MARTIN. For use w/ motors, gearmotors, pumps, tools and drive equipment. A complete three piece assy consists of 2 coupling bodies(ends) w/ desired bores & one spider (center).