Corrugated Steel Ground Sleeves with Steel Lightning Spike are designed for use in Ground Set flagpole installations. Our superior 2-piece design contains an upper section manufactured of galvanized 16-gauge corrugated steel tube, a thick steel base plate, and steel centering wedges welded into the base to assist in plumb installations of the flagpole. The lower section incorporates a threaded top 3/4" diameter steel grounding spike with 6" x 6" steel setting plate, allowing the concrete foundation to completely surround the sleeve. Ground Sleeves for flagpoles up to 75' can be shipped via UPS and Fed Ex, providing significant savings over competitor’s one piece designs. Contact Customer Service for custom sizes, larger sizes, or special applications.