Galvanized 24" X 1-3/8" Galvanized Screw Jack with 18" adjustable,<br> <br> The Screw Jack is made from a 1 3/8 inch Solid Stem with 6" x 6" base & a large wing nut 4 adjustment. <br> <br>Thread Screw jacks are the accessory used to safely adjust the scaffold legs. <br> <br>This may be necessary when different working heights are encountered or when the scaffold is mounted on sloped surfaces.<br> <br> Like all products that CBM supplies, the screw jacks are safety tested to meet or Exceed OSHA or ANSI Standard or building code requirements.<br> <br> They are designed for ease of operation and are compatible with the rest of the scaffolding system<br> <br> IF YOU HAVE ANY QUESTIONS PLEASE CLICK ON (CBM1290) AND CALL US.