Whether you're building a treehouse, playhouse, fixing a door or satisfying a "honey-do" for your spouse, power tools are where it's at. However, the efficiency of electric and gas powered tools comes with a higher level of risk and it is imperative to respect the tools you're using and pay attention to the task you are performing at all times.[caption id="attachment_21212" align="alignleft" width="300" caption="Using a jigsaw"] [/caption] The first thing to remember about power tools is that they are always dangerous. Even the most benign-seeming power tools can cause great harm if not operated properly. If there is electricity or gasoline involved, a conscientious builder never forgets that a lapse in attention can cause the loss of a finger or even a life. That being said, power tools can do jobs that would either be impossible or take a much longer time with hand tools. Most brands of power tools are very reliable, and have good warranties. [caption id="attachment_21237" align="alignright" width="275" caption="Handheld Jigsaw"] [/caption] A jigsaw is almost essential to any treehouse job. There will always be times when you’ll need to cut a rough opening in panel or plywood, either for a window or a door. A jigsaw can make quick work of the task. They are also good for more delicate cutouts. A small drill hole is all a jigsaw needs to start cutting an intricate shape. [caption id="attachment_21240" align="alignleft" width="300" caption="Handheld Circular Saw"] [/caption] Even more important than a jigsaw, a circular saw is used to cut almost anything, studs to beams, stringers to stair treads. Because it’s used so much, a cordless circular is a good idea (although there may be a trade off with torque — cordless power tools are typically less powerful than their counterparts). Just make sure there are spare battery packs to ex-change when the power runs out. [caption id="attachment_21249" align="alignright" width="300" caption="Disc Grinder"] [/caption] Disc grinder's are handy when it comes time to cut steel cable or grind excessive material off an object. And don’t forget the drill. A good power drill will be used to drill holes of all sizes and fasten screws, bolts, and brackets. It’s not a bad idea to have both a corded and un-corded drill on the jobsite.