205MM? – The 3980W power of the core drilling machine is strong and stable. Its max drilling diameter can reach up to 205 mm / 8 inches. It gives you a smooth speed change and simple operation. More importantly, the core bit in the picture is included. DURABLE CONSTRUCTION? – The diamond core machine has a steel forged output shaft for water supply that can be used for a long time. The pure copper water inlet is made to be anti-rust despite its need to contact water while working. EXTRAORDINARY PROTECTION? – We also provide overload protection and an upgraded cooling system for avoiding burn-in and prolonging the service lifespan of the drilling press machine and for your personal security. EASY TO USE? – It is both light and compact for easy transportation. With the ergonomic handle and the large base support, the lifting can be effortless, stable, and no shifting will occur. The aluminum guide rail can also make the drill rig’s movement smooth and accurate. WIDELY USED? – The diamond core driller can be widely used in drilling reinforced concrete, red brick, marble, and other materials. Such as installing air conditioners, pipes, stair railings, highways, and airports, etc.