Du-Bro Adjustable Ball Link 4-40 w/Hardware (2) DUB2137

This is a Du-Bro DUB2137 Adjustable 4-40 Ball Link Set with Hardware. Adjustable means you can adjust the tension on the ball.                                                                              

INCLUDES: Two adjustable swivel ball links w/ 4-40 self threading shanks.     
                      (1.142" total length) (Black)                                   
                     Two nylon lock nuts (Silver)                                        
                     Two 4-40x5/8" socket head cap screws (Black)                        
                     Two 1/16x1/4" Silver screws used to adjust the ball link            
                     Two beveled spacers .106x.248x.118 (ID x OD x thickness) (brass)    
                     Two 1/4" brass balls w/.10" hole