This variable speed, reversible drill features a beefy 4.9 Amp motor for powering through tough jobs. Bit installation is a snap with the nifty keyless chuck system. The larger trigger switch won't wear out your trigger finger. Quiet, it has a decibel rating of 79db. Its clever inline handle design maximizes power thrust. A large, recessed lock-on button will get you through those long jobs. And to extend tool life, Makita designed this 3.1lbs double insulated tool with all ball bearing construction. Features include a keyless chuck for fast and easy bit installation and removal; large trigger switch for easy operation; variable speed (0 - 2,500 rpm) for drilling in a wide variety of materials; in-line handle design for better control; large recessed lock-on button; and a reversing switch that is conveniently located.