*Efficient & Smooth Drilling: This diamond core drill comprises premium aluminum alloy components, and high-quality diamond grits ensuree longer coring life. Diameter: 4"/101mm, Useful length: 14/355mm. *Engineered For Exact Fitting: With 5/8"-11 Universal Thread, this core drill bit allows easy and fast assembling to a standard fixed core or hand-held drilling machine. It is also suitable for various devices. *Humanized Structure: Our diamond wet coring bit features chip removal holes, highly regular sawteeth, and concentric axes design. The innovative design allows it high drilling performance while keeping a long lifetime. *Simple Operation: The core drill can be used for both dry and wet to content your work needs. Start drilling at the vertical position and continue to dig deep. A little bit of water can prolong the service life. *Versatile Uses: Our concrete core drill is designed for drilling concrete, red brick, marble, and other materials on conditions, such as installing air conditioners, pipes, stair railings, highways, and airports, etc. ******************************************************************************************************* *Specifications Model: KZ4-10 Material: Diamond & Aluminum Alloy Bit Diameter: 4 in / 101 mm Useful Length: 14 in / 355 mm Total Length: 15.7 in / 400 mm Adaptor: 5/8in-11 Item Weight: 11 lbs / 5 kg ******************************************************************************************************* *Pakcage Content 1 Diamond Core Drill Bit 1 Blade