Kadee #145 HO 140-Series Whisker Metal Couplers Short (1/4″) Overset Shank – 11-0145 This industry leading coupler features an all metal coupler head, shank, and Whisker centering spring and comes complete with insulated draft gearbox and lid. The #145 Magne-Matic Whisker Metal Coupler may be mounted with the included #242 Snap-Together Gearbox or with other manufacturers cast-on coupler pockets. It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gearbox to avoid possible electrical crossover and shorting that may cause damage. Use the provided insulated gearbox or insulated #25 coupler. Two pair per package. (2) Pair #145 Whisker Metal Couplers – Short Overset Shank (2) Pair #242 Snap-Together Gearboxes (2) #622 Knuckle Springs This item is intended for modelling use and is not a toy. Actual product may vary slightly from the pictures shown.