The new Pro Series Peep is a sculpted to trim weight and boost bow performance. The hooded peep is 25% lighter on your string than the original Hooded Super Peep housing. This results in increased arrow speed. The Peep opening is 3-16 and accepts all Specialty Archery 1/8 apertures, clarifiers that sharpen target faces, and verifiers that sharpen pins. Use of the Dual Hex Aperture Wrench for insertion and removal of optional apertures, clarifiers, and verifiers is recommended. The 45 degree peep is generally used on bows 40 longer.