APANCHR-HSG-U Features: -Spiral post anchor.-Provides a cement free solution with the outdoor mailbox post kit and ground anchor program.-Helps prevent rust and corrosion.-4 x 4 Spiral post anchor.-18" Spiral post anchor.-Adjustable.-Adjustable base plate with spiral design.-Installs easily and allows adjustment after installation. Includes: -Instructions included. Color/Finish: -Hammerslag green finish. Specifications: -Can be used with traditional 4 x 4 wood posts or in combination with the outdoor mailbox post kit. Dimensions: -Overall dimensions: 22.23" H x 7.28" W x 7.28" D.