Electric Water Drilling Machine Diamond Core Drill 4300w Handheld w/ 3 Drill bit. Mechanical Clutch: The innovative mechanical clutch design disengages the drive instantly when the drill bit encounters resistance from hard materials. This feature effectively prevents the drill body from rebounding, enhancing operational stability and safety, particularly when working with uneven surfaces like reinforced concrete. Overload Protection and Burn-In Prevention: Equipped with a built-in current overload protection system, this drill automatically shuts off power when the motor experiences abnormal load conditions. This safeguard prevents overheating and motor damage from stalling or voltage fluctuations, ensuring a longer equipment lifespan and minimizing the risk of unexpected downtime. Stepless Speed Control with Lockable Constant Speed: This drill features stepless speed adjustment, allowing users to choose the optimal speed based on the material’s concrete strength and hole diameter. The lock button locks the speed, freeing your hands, accommodating diverse working conditions for precise and effortless operation. 130mm Large Aperture Capacity: The drill allows for a maximum hole diameter of 130mm, meeting a wide range of engineering requirements from pre-buried pipes and ventilation openings to the installation of large anchor bolts. This versatile tool minimizes the need for multiple machines, boosting construction efficiency. 4000W high power copper motor: high temperature resistance, using uniform machine winding and hook winding. Better conductivity, stronger power and more durable. Cooling system: Multi-outlet heat dissipation design, efficient heat dissipation and effective protection of the motor, longer service life. No water seal design: using the traditional way of water seal box, can achieve dry and wet, suitable for wet beating, not suitable for long time dry beating operation. Drilling Bit Diameter: 25mm/32mm/63mm (370mm length each). Max Drilling Diameter : 130mm. Plug: GB two-pin plug with UK Plug Adapter. 1 x 4300w Water Drill. 3 x Drill Bits (25/32/63mm). 1 x Water Pump. 1 x 3m Water Hose. 2 x Carbon Brushes. Our warehouse is located in UK. Should you change your mind and wish to return your item, this can be done if you notify us within 30 days of receiving your item. Customer satisfactory is our number one priority. We will try our best to address your concerns, We guarantee everything we sell and stand by all of our products. We always want to offer you a complete, hassle free and enjoyable shopping experience!