Using your DeWalt 9 Ft. Magnetic Pocket Tape Measure is a breeze. To measure, simply pull out the blade and lock it in place when you reach the desired length. You can use the belt clip to carry it around easily, or use the rear magnet to attach it to metal toolboxes for storage. When using it on drywall or plywood, make sure the blade is straight for accurate measurements. As for maintenance, keep it clean by wiping it with a dry cloth after use. Avoid dropping it or subjecting it to heavy impacts as this could damage the hi - impact ABS/rubber housing. If the blade gets dirty, you can gently clean it with a mild detergent and water, but make sure it's completely dry before using it again.