For aluminum or fiberglass extension ladders. 46" span. Requires no tools. Spring-loaded locking latch makes it easier and quicker to install/remove than any other stabilizer on the market. Mar-resistant rubber end caps protect work surface. Stabilizer comes with instructions. Paint can hook included. Not to be used on ladders over 40'. Shipping quantity (1) per carton. Approx. Shipping Weight: 6.4 Lbs. For use with 1-3/4'' flat rungs, 1-1/2'' flat rungs, 1-1/4'' round rungs.