The most advanced peep system in the archery industry, completely designed for ultimate accuracy. CST  Center String Technology Podium Peep Aperture located on center of bowstring  no L and R misses. OCT  Optical Centered Technology  Improved centration of lenses for ultimate accuracy. PLT  Protected Lens Technology Lenses protected by plastic on 2 sides prevents cracking. DSAT  Dual String Angle technology has both 37 and 45-degree string angles on the same peep housing. TAP  Tool-less Aperture Technology Knurled Tool-less Podium Peep Aperture eliminates the need for an aperture wrench. Podium Peep Clarifier or Verifier lenses can be removed from the peep for easy cleaning. Additional Podium Peep Shade Cap accessory screws into front of peep to prevent glare. NOTE: Podium Peep Apertures, Podium Peep Clarifiers, and Podium Peep Verifiers fit into Specialty Archery Podium Peep ONLY. NOT compatible with other Specialty Archery peeps. Peep weighs 19 grains.