【Excellent Durability】This round knife is made of top-grade materials and has super durability to ensure long-term use. 【Ergonomic Design】The round handle design is ergonomic and fits perfectly in your hand, improving work efficiency. 【Precise Scale】Equipped with clear and easy-to-read scales, you can easily and accurately cut out the desired circular size. 【Wide Application】Suitable for gypsum board and other materials, it can safely and efficiently cut circles with a maximum diameter of 400mm. 【Easy Operation】It can be easily cut with just a tap using a mallet or hammer. The operation is simple and suitable for all types of users.