Quick Details Customized support: OEM, ODM Place of Origin: Zhejiang, China Brand Name: / Model Number: SY-KKQ Type: Core Drill Bit, Dryer Hole Opener Use: Punch Finish: Other Advantage: No need to add water for cooling Size: 6mm - 100mm Material: M14 steel with diamond head Color: Customizable Shank Type: Circle, triangle MOQ: 100 pcs Packing: Plastic pipe