Using the Makita 66 - Piece Contractor Bit Set is a breeze. For drilling, simply pick the appropriate bit (spade, brad point, or metal drill bit) based on the material you're working on. Insert it into your drill or impact driver and start drilling. When it comes to fastening, choose from the insert bits, power bits, or nutsetters. Just attach them to your tool and get the job done. When you're done, store the bits in the case. The color - coded insert bits and specific holders in the top tray make it easy to put them back in the right place. Also, you can use the secondary insert to store other small items. As for maintenance, keep the bits clean after each use. Wipe them with a dry cloth to remove dust and debris. If they get dirty, you can use a mild solvent. Make sure to keep the case closed properly with the interlocking latches to protect the bits. Also, since the set is compatible with other modular storage systems, you can organize it even better according to your needs.