This is a Kwik Grip E/Z Connector set by Dubro.
EZ Connectors link a pushrod to a servo arm allowing it to pivot for
less bind in control surfaces.

Features

Works on 2-56 and smaller wire (.078")
Permanent or snap on mounting push nuts both included.

Includes

Two brass EZ Connectors
Two plastic snap nuts.
Two metal snap nuts.
Two 2.5x3.5mm slotted head screws.

Requires

Assembly onto linkages
Kwik grip E/Z connector wrench. DUBQ1867.

Specifications

Length of brass connector: 10mm (.395")
Diameter of brass connector: 5.5mm (.217")

Comments

These differ from the standard E/Z connectors DUBQ1860 in that they
have a hex shape for easy tightening. Use in conjunction with
DUBQ1867 for quick, easy grip installation.