[Our box-shaped pellet collecting target also known as bullet trap is rated for .22 and .177 caliber rimfire rifles and other non-steel pellet air rifles. The bullet trap is made of durable steel weighted over 16 lbs. Required to be placed on a table or its corresponding target stand target mount is sold separately. "Steel pellets may leave marks and cause some damage to the trap but the non-steel pellets wont. Follow the instructions screw up and finish the assembling steps" It collects all the bullets and pellets that you hit easy to clean. Was mainly designed for outdoor uses. 100 paper targets and 2 cardboard targets are included. (11"*11"). Paper targets come in 2 types 50 in each type.]