The high performance drills from 7 Leaders come in 2 types,the high speed drills, and the high performance drills with oil feed coolant. These drills are suitable for deep drilling of materials and are highly wear resistant. This allows customers to reduce their production costs whilst the efficient cutting also reduces drilling times. 7 Leaders drills can be produced with flute lengths ranging from 3X drill diameter,right up to 30 times drill diameter to suit a wide range of machining situations and cutting challenges.