Coronet Bits, Spurs, Stirrups, Irons and Accessories are made of the finest metals and materials and are held to the highest standards of quality control. Every piece is polished and inspected before leaving the factory. Close attention is paid to detail to make sure that all items will pass the criteria for breed and disciple regulations where appropriate. NOT JUST A BIT - It's an ''adjustable'' mouth bit!! Brand New design! Patent Pending. No more mistakes in buying the wrong size, less to have hanging around on your tackroom wall. This innovative new bit adjusts to precisely fit any size mouth from 4-1/2 '' to 5-3/8''. Simply twist the shanks in opposite directions and the bit size increases or decreases. No tools required. A simple concept that works.Size: 4 1/2'' - 53/8''