HiKOKI 961781 Brush Cap for a wide range of compatible Hitachi and HiKOKI corded power tools including circular saws, drills, routers, hammers and grinders. This replacement threaded cap fits into the brush holder to securely retain and protect the carbon brush within the motor assembly. Suitable for replacing a cracked, worn, damaged or missing original brush cap and manufactured to the correct specifications for precise fit and secure installation.