Count On Tools' PB Swiss Tools’ Holding Ring Hex Keys allows fasteners to be inserted or removed in hard-to-reach locations without the fastener falling off the tool and without sacrificing strength. The hex key L-wrenches for hexagonal socket screws are equipped with a holding ring on the ball end. The inlaid circlip spring ring holds screws firmly onto the tool, which facilitates work on difficult-to-reach areas. Because the holding ring is inlaid, wearing out the functionality of the feature is not a concern. Also, this allows movement up to 30° when tightening and loosening the screw.