Features: Feature: Flat designed to meet the most exacting faceting requirements, flat diamond-disc for fasting stock removal on concrete. Premium and Reliable: Grinding wheel is made of diamonds-material, which is sturdy, wear resistant, and providing fast and efficient grinding and polishing. DIY Friendly: Angle grinder wheel can be used for DIY grinding and polishing of wood, metal, and mode. Ideal for both professional craftsmen and hobbyists. Suitable machines: When installing on the angle grinder, it can be installed directly or a extension rod can be added. A connecting rod should be added when it is mounted on the electric hand drill; Please follow the instructions of angle grinder and electric hand dril. Widely Used: The diamond-grinding wheel is usually suitable for concrete, granites, stone, marble, ceramic tile, stone, and other building materials. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: Diamond-material Specifications: 2.5cm grinding head 2.5cm grinding head + 4cm extension rod 2.5cm grinding head + 6cm extension rod 6cm 2.5cm grinding head + 8cm extension rod 2.5cm grinding head + 14cm extension rod Product size: 2.5cm grinding head + 4cm extension rod: 4*4*2cm 2.5cm grinding head + 6cm extension rod: 4*6*2cm 2.5cm grinding head + 8cm extension rod: 4*8*2cm 2.5cm grinding head + 14cm extension rod: 4*14*2cm Package List: 1x Diamond-Grinding Wheel or 1 Set Diamond-Grinding Wheel