Rotary slips can accommodate drill pipe from 2 3/8-7in(60.3-177.8mm)O.D. They Are classified as type Ultra-Short(SDS-S),short(SDS),Medium(SDML) and Extra Long(SDXL) according to gripping length.SDS-S slips and SDS slips are designed for shallow drilling,SDML slips are the perfect choice for all medium depth drilling,SDXL slips are designed for deep drilling.