Shop for Ladders from Hayneedle.com! The Louisville 6-17 ft. Aluminum Multi-Purpose Ladder isn't the best ladder around - it's the 4 best ladders around! This amazing multi-function ladder operates capably and safely as a 4- to 7-foot stepladder 9- to 15-foot extension ladder 3- x 5-foot stairway 1- to 3-foot scaffold Every setting can be made by a single person, using the built-in quick-activating snap-lock hinges. Heavy-duty locking pins ensure safety in every setup as ensured by ANSI, CSA, and OSHA safety rating approvals. There's a telescoping bottom for maximum security, and unique telescoping design for minimum required storage space. About Louisville Ladder Since 1946, Louisville Ladder has been innovating in the field of climbing products and building a rock-solid reputation. As the first company to create aluminum step and extension ladders and the first to create a fiberglass ladder, they're well aware of the ground they stand on. Look to Louisville for rock-solid basic products and incredible new inventions designed to let both the homeowner and professional worker reach new heights.