Description Our steel clamp-on style sign holder installs in seconds by clamping around the rail head for easy on, easy off exposed rail applications. Fits rail sizes from 90 to 141 lb. yd. Sign plate is NOT included. We have a wide variety of OSHA-mandated sign plates to choose from. View OSHA-Mandated Blue Flag Sign Plates Weight: 5 lbs. IMPORTANT: This sign holder is designed to accept 12”x 15” and 15”x 18” Aldon manufactured sign plates with item numbers starting with “6” or “7”. Other sign plates may require additional mounting holes to be installed by the customer. Aldon can install custom mounting holes upon request for an additional charge.
