Dia-Compe ENE Bar-End Shifters
These Dia Compe ENE shifters are some of the best shifters of all time. These are so smooth because the ratchet equalizes upshift and downshift effort so perfectly that they will satisfy even the most demanding randonneur. These shifters are made by Dia-Compe, so the quality is first rate.
They work with 5-speed to 10-speed cassettes and freewheels and most common derailleurs. (Note: most SRAM derailleurs don't work with non-SRAM shifters.)
Sold as a left and right set.