Using the Makita D - 21347 scaling chisel is easy. First, make sure your hammer (either Makita or other compatible 1 - 1/8 inch hex hammers) is turned off. Insert the chisel into the hammer. When you're ready to start, turn on the hammer and use it for chipping, edging, or channeling as needed. For chipping dried concrete, the two cutting angles will help you work more efficiently. When using, wear safety goggles to protect your eyes from flying debris. After use, turn off the hammer and remove the chisel. To keep it in good condition, clean the chisel regularly to remove any debris. Store it in a dry place to prevent rusting. With proper use and maintenance, this chisel will serve you well for a long time.