The tool user must be familiar with the performance, characteristics, use, storage and repair and maintenance methods of the tool. All construction tools must be qualified products from formal manufacturers. Tools must be inspected before work, and unqualified tools such as corrosion, deformation, loosening, failure and damage are strictly prohibited.
Hammer is the main striking tool, which consists of hammer head and hammer handle. According to their functions, hammer is divided into rust removal, teat hammer, machinery, claw hammer, inspection hammer, flat tail inspection hammer, octagonal hammer, German octagonal hammer, nail lifter.