A simple and accurate way to turn a radius on your manual lathe. Each unit features a rigid cast iron construction for an accurate chatter-free operation and long life. The gearing is fully enclosed to prevent the entrance of any chips or foreign matter. Setups are quick and easy. An extension handle is included to keep your hands away from the hot chips while feeding the tool. All tools use 1/4" square tool bits except for the No. A1-248-04 which uses a 3/8" square tool bit.