The Bolt Bun 90 surrounds and protects anchor bolt projections from trucks and equipment until steel columns or equipment is installed. Protects workers from dangerous trip and impalement hazard. High visibility safety yellow. Durable, UV-resistant HDPE construction. Reusable. Stackable for transport and storage.Fits up to 1-inch diameter (M24) bolts with at least 3 inch projection above concrete surface and spaced between 4 and 8 inches apart. Made in USA.