This nickel plated steel rivet can be used on the following saddles:-- B66 & B67- B66 S & B67 S- B72 & B73- B68 & B68 S- B17 Standard, B17 Standard S & B17 Narrow- Flyer & Flyer S- B33, B135 & B190- Swallow in all of its versions- Aged range of saddles- Imperial range of saddles