Kadee 451 HO Scale Extended Swing Gearbox & Metal Couplers - Medium (9/32") Centerset

The Kadee #451 Extended Swing Gearbox lets a coupler swing through a much larger arc than a standard gearbox — essential for long passenger cars and articulated locomotives navigating tight (typically 18"+) HO curves without binding or coupler-pop derailments.

When to use it

• 85'+ passenger cars (Pullman, Amtrak Superliner, etc.)
• Articulated steam locomotives (Big Boy, Challenger, Mallets)
• Auto racks, intermodal flat cars, long ribbed-side hoppers

Package

• 2 pair extended-swing gearboxes & lids
• 2 pair Whisker® metal couplers — Medium (9/32") Centerset

Specifications

• Scale: HO (1:87)
• Brand: Kadee® — Made in USA
• SKU / Item: #451