Features and benefits

• Use extensions to gain access to fasteners in locations that would otherwise be difficult to reach.
• Male square is oriented in-line with female squares for use with fixed head torque wrenches.
• Full chamfer at drive opening (when applicable) for easy engagement with drive tools.
• Drive end chamfer and four detents help provide quick positive engagement with drive tool on any of the socket drive walls.
• Features two thru holes and a groove to accept a Proto retaining ring or pin or o-ring to help secure extension to the drive tool anvil.