Tianyutools is a professional manufacturer in producing a range of S.A.E&METRIC tap and die  set, zise from M3~M12~M24 and 4-40~1/2-13~1inch. Besides,we also producing Informal straight drill bit and other special handle tools.Now we already have more than 50 pro-machines and tested machines.Our products are seld well in many countries of the world.We sincerely welcome the clients from home and abroad come to have a visit.