Cheston Rotary Hammer Drill Machine 20MM 500W 850RPM with 3-Piece Drill Bit (18mm Demolition Hammer) 6 months warranty over manufacturing defects from date of purchase Ideal for drilling anchors and fixing holes in concrete, wood or masonary. Includes 3 drill bits for the purpose Optimum drilling diameter in concrete: Up-to 20MM ,Everyday hammer drilling in concrete, masonry and natural stone Single-mode SDS rotary hammer (hammer drilling) || Sturdy motor with high load rating for maximum reliability Lock-on button for continuous use || USE HAMMER FUNCTION FOR TOUGH DRILLING