Mastercool 98134 R134a Low Side Octagon SocketThe product is twist length: 5/8; overall length: 1-5/8; black oxide finish for corrosion resistance drill exact size hole for tapping (used where more precisely sized holes are required) shorter length for increase strength and rigidity 118 conventional point. p/p. produced with the highest grade materials. Product is of great value and easy to use.