The 4 - Tooth Chain Disc consists of a 2" diameter chain with 4 teeth coated with tungsten carbide and two patented 10mm mounting discs. The 4 tooth chain disc is the flag ship trimming disc for Boss Tools. There is no other chain disc more aggressive than the 4 tooth. The chain disc is incredibly versatile and makes trimming hooves easier, faster, smoother, and less painful compared to the traditional hand tools used for hoof trimming. The 4-tooth chain disc is best suited for use with horses and cows. We strongly encourage the use of a hoof support system to minimize hoof movement when using the chain disc.