The #2 clarifier is recommended for use with a 4X, 6X, 7X, and possibly 8X scope lens. For the target shooter there are 3 different clarifier magnifications available with 1/32", 3/64", 1/16", 3/32", 1/8" and 1/4 hole sizes. The clarifier will make the target crystal clear allowing you to pick out the details at a distance. The clarifier will work in all the Super Peep Housings. You will need a reducer for the 1/4" Super Peep Housings if not choosing the 1/4 inch option.