Collar Removal Socket Set (4PC) For Hi-Lok And Hi-Lite Removal sockets for Hi-Lok®, Hi-Lite®, Eddie-Bolt® Fasteners. For 5/32”, 3/16”, 1/4”, and 5/16” Collars.Replaces ATSK3581-4PC. Set consists of: OMSK3581-5/32”, OMSK3581-3/16”, OMSK3581-1/4”, and OMSK3581-5/16. These patented collar removal sockets feature set screws for square drive retention and are made of tough 17-4 tool steel, which has been heat-treated for maximum wear resistance. OMSK3581 series sockets incorporate a tapered bore with innovative ”dual lead” left-hand threads that grip for quick removal by simply screwing themselves counter-clockwise onto a collar.Collars are then easily removed from the sockets by rotating clockwise with pliers or other tools. This system is best suited to aluminum collars. Eddie-Bolt® is a registered trademark of Howmet Aerospace Inc. or its subsidiaries.Eddie-Bolt® is a registered trademark of Howmet Aerospace Inc. or its subsidiaries.<img alt="OMSK3581 Series Collar Removal Sockets"