.050" Thick Top of Keyway Tension Tool TOK-FP-050 for Flush Plugs provides optimal fit and stable placement in locks with flush plugs such as those used on most key-in-knob, mortise, rim, and deadbolt cylinders. The steel thickness is clearly labeled on the tool for easy identification. Thickness: .050", Length: 3 inches. Use TOK-RP-050 for tulip knobs with recessed plugs.