Rotary Slips can accommdate drill pipe from23/8-51/2 inch(60.3-139.7mm)O.D.. They are classified as type Short(SDS), Medium(SDML) and Extra Long(SDXL) according to gripping length. SDS slips are designed for shallow hole drilling, SDML slips are the perfect choice for all medium depth drilling, SDXL slips are desinged for deep drilling. lucky@lakepetro.com skype:lucky_lakepetro