Specialized X-Top brake levers for 31.8mm bars. Used, $30.00/set

X-Top levers (sometimes called "In-line" levers) are mounted on the tops of drop bars. The brake cable from the drop bar brake lever (either an integrated/brake-shift or simple brake lever) is threaded through the X-Top lever, allowing the rider to stop the bike with his hands on the tops.

Hinged clamp allows installation without removing the brake levers, grips or tape.

A simple idea that gives much more braking force than Dia-Compe's old safety levers.

They are clearly Specialized product.