![]() The tool is L-shaped and is often designed to be used with both sides.Either end of the tool can be used to take advantage of reach or torque.The tool can be manufactured very cheaply, so one is often included with products requiring end-user assembly.Very small bolt heads can be accommodated.Torque is constrained by the length and thickness of the key.The screw can be inserted into its hole using the key.The tool can be used with a headless screw.There are six contact surfaces between bolt and driver. ![]()
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