General-use drills suffice for most work, though you might want more speed, power, and run time for tougher jobs. Light-use models (often costing less than $100) make up most of the market and have smaller, 3⁄8-inch chucks.
A cordless drill is the most important power tool you’ll buy. It’s the one you’ll rely on both for big projects, like building a deck or remodeling a kitchen, and for smaller tasks, like installing fixtures or assembling furniture. You might even need your drill to service other tools.