Our beloved Budnitz Titanium Setback Seatpost is beautiful, lightweight, and will never slip once the head is cranked down.  We chose this design because of its beautiful circular indexed head and hidden rear lock bolt, which allows you to adjust your saddle's front-back position without changing the seat angle.  

Brushed titanium with matching alloy end caps and titanium bolts.  

Also available in a 40mm-setback version.