Trike: Point your browser at Rivets Plus, http://rivetsplus.com/fastener.asp About 1/3-1/2 way down the page there is a link to both the 5/32" (used by Airstream) and the 3/16" shaving tools. Rivet specs can be found at http://rivetsplus.com/manufacture/gesipa/bulb_tite.asp - Dick (5368)