400 range of torque screwdrivers with vernier scale adjustment. This durable and low torque tool has great accuracy and conforms to international standards ISO 6789. It features an automatic release at preset torque and automatic resetting. Torque screwdrivers can cover a wide variety of fastening applications and ensure tightening to a specified torque. This driver can be used in various areas such as telecommunications, industrial manufacturing and maintenance, automotive and electronics. This is the following type of adjustable driver: A. This driver has only been used about 5 times.