MetalTech Adjustable 2-Rung Ladder Jacks 21.75" x 10" x 16.75" Welded Aluminum
Can be used with planks up to 18 ft. W and are welded and riveted for added safety. Supports up to 250 lbs. X 16.75 In. Aluminum Adjustable 2-Rung Ladder Jacks For Scaffold Extension Boards, Ladder Or Plank.