About this item?PRECISE] The Jaw is processed with Wire EDM Cutting?DURABLE] The head part is made of one piece high-grade special tool steel?LABOUR-SAVING] Extended handle for extra mechanical advantage?ERGONOMIC] Comfortable grip with anti-slip design for easy operation?PROFESSIONAL] Specially designed for battery lugs and open barrel connectors with a capacity of 250-300A/300-400A/400-500A