Quake Scope Eye Recoil Pad (One Size Fits All) by CVA MUZZLELOADERS Avoid Eye Injury! Most eye ends are made of metal or a hard rubber. Our Scope Eye™ and designed to reduce the risk of injuries from such scopes and is made from a soft and polymer material and slips directly over the scope eyepiece. The Scope Eye™ fits most scope eyepieces from 1.4" to 1.6 diameter. It can mean the difference between a safe and successful hunt and an unexpected trip to the doctor's office.