The Ladder-Lock is a ladder conversion kit designed to increase user safety by improving an extension ladder’s stability. Compatible with most 16- to 24-foot extension ladders with hollow rungs, the Ladder-Lock features two adjustable legs that connect at the ladder midpoint, and two adjustable arms that anchor to the ladder’s lowest rung. Aluminum rods can be inserted through the hollow rungs of both sets of legs and braces, generating a sturdy base capable of bearing loads over 450 pounds. Kits will be available in December for about $400.