... bur, ZZZ bur Wieland bur, VHF zirconia bur, manual operation bur, ZZZ bur The photos and introductions belong ... deep groove, round head, end angle R, hollow, oblique flute (tapered), long flute, for aluminum, copper application, chip-dividing groove (for ... other problems? LZQ is possessed of cutting-edge & comprehensive production system, as well as rich producing & machining capability with different ...