Features: Segmented of 2-14inch bits provides fast cutting. V-shape segment tips available for easy starting. Applications: Cured reinforced concrete with soft to hard aggregates, green concrete, asphalt and abrasive materials. Machinery: Core drill machine and hand drill, driven by hydraulic power station or electric motor. Cutting method: wet. dry. Wet cutting is recommended. Weld type: Laser weld,high frequency weld. We first provide laser weld core bits, which provide better cutting quality and security. To get more informations,please browse our web site:BJSKYTECH. you could the detailed informations about our products and our contact information.