Choosing the right drill can make any job easier and faster, along with producing a better quality end-product. For on-site work, most contractors rely on cordless, rechargeable drills, but for workshop use, mains powered drills and drill/drivers are the preferred choice. Handheld drills are the most commonly used type, but small bench drills are ideally suited to repetitive production work. Suitable drill accessories such as machine vices and replacement chucks are available. Most mains powered drills are designed to operate on a U.K. mains supply, but it is important to check the equipment specifications and U.K. buyers may need to use an adapter where a U.K. plug is not fitted as original equipment. Points to consider when buying a drill include power, speed and intended use. Small, delicate work is more easily managed with small drills. Hammer drills are a good all-round choice where masonry drilling may be required, and impact drills provide high levels of torque, making them ideal for high-speed assembly work. The powerful SDS drills are the best choice for difficult materials such as concrete and for chasing out, with many capable of being operated as power chisels.