The Matrix quick connect system lets you drill, cut, sand and more with a base tool and a variety of interchangeable attachments, featuring best-in-class speed and torque, the system enables you to build your workshop as you go and tackle virtually any household task while saving money and space.Quick adjust button allows for quick depth adjustment up to 1 inSpindle lock feature allows for single wrench bit changesVariable speed allows for precision performance that is right for each job