Description This locking clamp-on sign holder ensures the sign holder cannot be removed from the rail when blue flag protection is needed. Anti-roll bars hold sign holder to rail in 75 mph wind. Steel holder clamps to rail head. Easy on, easy off. Fits rail sizes from 90 to 141 lb. yd. Brass Padlock Included. 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: 7 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.
