Bare-Co Patent Lever Release Shaft Guard allows shields to be pulled back to facilitate SAFE Engagement of PTO Shaft, yoke and regular joint maintenance. Shield Specs. Yoke bearing diameter 1 5/16″ to 2 1/8″. Closed Length- 40″ Open Length-63″ Yoke bearing groove dia 1 5/16″ to 2 1/8″ BARE-Co shafts up to and including series 4 BYPY shafts up to and including series 4 with triangle profile drive tube U.S. 6N – 12N Series WALTERSCHEID shafts up to and including series W2100 Shaft guard kit comes with plastic bearing kits to fit many shapes & sizes of drivelines