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Precision Single Joint Universals - Align in one direction       

US     Shaft holes are 3/16" dia. on both ends.            
US-2  Shaft holes are 1/8" dia. on both ends.               
US-3  Shaft hole is 3/16" dia. on one end and 1/8" dia. on the other end.

Now available in Metric to Metric and Metric to Inch sizes:

US-4  Shaft holes are 4 mm dia. on both ends.
US-5  Shaft holes are 4 mm dia. on one end and 1/8" dia. on the other end.
US-6  Shaft holes are 4 mm dia. on one end and 3/16" dia. on the other end.

US-7  Shaft holes are 3 mm dia. on both ends.
US-8  Shaft holes are 3 mm dia. on one end and 4 mm dia. on the other end.
US-9 
Shaft holes are 3 mm dia. on one end and 1/8" dia. on the other end.
US-10  Shaft holes are 3 mm dia. on one end and 3/16" dia. on the other end.

Price:  $18.00 each