New motor gives improved performance in applications with dry core bits up to 127mmn in bricks or soft masonry. Electronics provide e-clutch, power-up and overload protection. Two speed gearbox for increased versatility when drilling in wood, metal and concrete with standard drill bits. Electro-Mechanical clutch increases user control and protection Heavy duty 16mm steel chuck allows quick bit change whilst offering excellent bit retention. Innovative mode selection collar allows intuitive control for optimal performance. This set also includes heavy duty 10 Piece diamond core drill set , which is supplied in a aluminium carry case. Dewalt Diamond Core Drill Includes: Multi-Position side handle Depth Stop Heavy Duty Carrying Case