Kadee HO 118-25 Metal "SF" Shelf Whisker Coupler Medium (19/64") Centerset Shank (25-Pairs)

The #118 Kadee Magne-Matic Coupler features a Metal Coupler, insulated #242 Draft Gear Box and Lid with center screw holes for mounting. Shelfs actually work. The #118 Coupler may be mounted with (Not included in the Bulk Pack) #242 draft gear box or with manufactures cast-on coupler pockets. Manual uncoupling requires the #241 Dual Tool. The "SF" Shelf Coupler can be easily modified to look like the type "F" Shelf Coupler or "H" Passenger Car Coupler.

 From Kadee Website:

The #118 Kadee^® Magne-Matic^®. Shelfs actually work. The #118 Coupler  Manual uncoupling requires the #241 Dual Tool. The "SF" Shelf Coupler can be easily modified to look like the type "F" Shelf Coupler or "H" Passenger Car Coupler. 

Our #118 SF and #119 SE double shelf couplers are two totally different types of couplers and are made to actual scale. The #118 SF coupler looks over scale but it is not, it looks this way because it's simply a larger prototype coupler. Both couplers are fully functional and will not slip up or down out of the opposing coupler. Although they are not designed to compensate for rough or bad track, many modelers use them on their longer rolling stock rather than fixing their track.

It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gear box to avoid the possible electrical crossover or shorting that may cause damage. Use the provided insulated draft gear box .