Hi, my name is Guilliano Prieto, a general engineering contractor with Prieto Engineering in Los Angeles, California, and today I will show you how to use a concrete power trowel. A concrete power trowel is used very similar to a hand trowel. A hand trowel is a tool that is used in the final stages of the finishing process after pouring concrete. A concrete power trowel is used in areas that are a little bit larger than you'd use a simple hand trowel. Power trowels are typically used in areas from about 300 to around 5,000 square feet, whereas a hand trowel can be used in smaller areas and also in areas where the power trowel can't quite reach. A power trowel works very similar to the way a hand trowel works. A hand trowel needs to be adjusted on pitch of the actual hand trowel and also the speed in which it functions. The power trowel has four trowels located at the bottom of the machine and those power trowels rotate. The pitch is adjusted using this lever, changing the pitch of the trowels below the machine. The speed at which the trowels below the machine rotate are adjusted with this lever. The first thing that you need to do in order to turn on the machine is to turn the switch to the on position and you want to hold on to the stem or a certain part of the machine. You want to take the pull handle and give it one good pull, or as many pulls as it needs to turn on the machine. You want to get right behind the machine and be ready to get started. I'm Guilliano Prieto with Prieto Engineering, and thank you for watching my video on how to use a concrete power trowel.