The Caldwell Lead Sled practically eliminates recoil! The “Sled” reduces punishment to your shoulder up to 90% by trapping recoil energy in the frame of the rest. That makes your time at the range more enjoyable and provides for faster, more precise sight-in and load development. The lack of felt recoil while shooting also puts an end to flinching. This prevents you from developing bad shooting habits that might cause problems in the field. Designed for all calibers but is especially effective on medium to large caliber rifles and shotgun slugs. (Examples: .30-06 - frame only reduces recoil 66%; 12 gauge slug - one bag of lead shot reduces recoil 82%; 458 Win Mag - two bags of lead shot reduces recoil 89%.) The user-friendly portable design includes an adjustable-height front rest and large rubber feet. Uses Caldwell brand Universal Front Bags. Some assembly required.