characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element

Drill bits > characterised by wear resisting parts, e.g. diamond inserts > Button-type inserts > with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts > characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element

Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > characterised by wear resisting parts, e.g. diamond inserts > Button-type inserts (E21B10/52 takes precedence) > with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts > characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element