A simple and accurate way to turn a radius. Each unit features a rigid cast iron construction for an accurate chatter free operation and long life. The gearing is fully encloded to prevent the entrance on any chips or foreign matter. Extension handles are 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. 24804 which uses a 3/8" square tool bit. Note1: 24801, 24803 and 24804 are for lathes 13" and over Note2:24805, 24806 and 24807 are for lathes 9" to 13"