These Angled arm pad adaptors are made of high grade aluminium specicially designed to angle the arm pad for use with 'higher hands' position on time trial and triathlon bikes. 
 
These adaptors significantly improve comfort at the elbow joint and make the bike much more stable due to increased contact area with the pad. 
 
15 degree adaptors work with anything from a 20 degree arm angle to 40 degree arm angle.