... IADC 437 9 1/2"Kingdream TCI rock drill bit sizes HAT series for water well 1.Introduction ... bits, tricone bits, single cone bits, steel tooth bits, insert tooth bits, roller bits, drill bits, drilling tools ... provides the highest quality products and attentive service for our customers". We are looking forward to ... your special need. 3.Sizes and types of drill bits we can privide: 60mm,65mm,76mm, ...