How to fix extension ladder rung lock? The black 'flipper' is stuck in the closed position somehow and now doesn't allow the ladder to extend (pic 1). Should look like the second
Lynn Ladder D-Rung Lock Assembly L53-6
Replacement Rung Locks Kit/Aluminum Extension Ladder Parts for Fiberglass Extension Ladders - Amazon.com
3.8m Telescopic Ladder with Detachable Hooks, Aluminium Extension Ladder - Anti-Slip Feet & Steps for Safety Use, Folding Step Ladder Loft Ladder, 150KG Max Load : Amazon.co.uk: DIY & Tools
Sterk Systems Aluminium Double Extension Ladders
Waku Hook On Platform
74-1 | Accessories | Werner US
Werner Square Rung Double Extension Ladders (7 Sizes) - Tufferman