Impact Bag The Best Golf Training Aid Ever! from The Golfing Machine The Golfing Machine's Imapct Bag is the best Impact learning aid in golf. It comes pre set with a foam interior so you do not have to find used towels to insert into it. You can look on-line at www.thegolfingmachine.com for other practical uses for the 3D Impact Bag. One purchase many uses including Plane Angle and Angle of Attach.