Evolution Gun Works Commander Keyed Reverse Plug w/.332in Hole 1.25in Carbon Steel Blued Finish. 25"Hole Diameter:.332"Shoulder Length: .380"Spring Bore Depth: 1.150"Reverse Plugs from EGW are designed for easy installation and increased performance.Made from carbon steel (not lead alloy) to eliminate cracking the rounded shoulder is extended for added support with no exposed area where cracks can occur.A reverse plug is used in comp guns and bull barreled pistols where there is no bushing to retain the spring.This plug is for Commander length slides only. Available in Carbon Steel only. Must be installed by a competent gunsmith. Specifications for Evolution Gun Works Commander Keyed Reverse Plug: Manufacturer: Evolution Gun Works Color: Black Finish: Blued Fabric/Material: Steel Package Contents: Evolution Gun Works Commander Keyed Reverse Plug Evolution Gun Works 12072: Commander Keyed Reverse Plug w/ .332 in Hole 1.25 in Carbon Steel Blued Finish