Crown CT10128 Impact Drill Machine is a versatile power tool used for drilling holes in various materials. It is designed to apply a rapid series of concussive blows to the material, making it easier to drill through hard surfaces like masonry or concrete. 600W is the drill's power rating, measured in watts (W). A higher wattage generally means more power and the ability to handle tougher drilling tasks. The chuck size represents the maximum diameter of the drill bit that the drill can accommodate. In this case, the drill has a chuck size of 13mm, which means it can accept drill bits with a maximum diameter of 13mm.