Casing shoes and casing shoe bit NW Casing shoe and Casing shoe bitHW Casing shoe and Casing shoe bitEvery performance Lets the casing shoe effective in ... NW , HW , PW , SW ( include NQ , HQ , PQ drilling rod casing shoe)Crown : flat and "V" type, and other types needed ... by customersNatural diamond set-surface and impregnated diamond casing shoewe can provide1. AQ rod, BQ rod, NQ rod ...