The Fletcher TRU-PEEP is an all aluminum peep sight that weighs a mere 8.5 grains.  It's ingenious design allows for a perfectly round, shaded hole at full draw and eliminates the need for a protruding hood.  String roll and angle aren't a problem.  Safety-tie groove keeps peep in place.  The TRU-PEEP is available in 4 sizes.  The HUNTER is 1/8" hole, the LARGE is a 1/16" hole, The SMALL is a 3/64" hole and the MICRO is a 1/32" hole.  No tools needed for installation.