Oversized for quick access from all shooting positions. Allows brisk, easy operation with left hand. Makes the charging handle easier to find and operate, especially on scopes. Expedites reloads and immediate action drills. Legal for NRA high power match shooters. Works on all charging handles. Easy install, all you do is punch out the pin, remove the old one, put the new one in, replace the pin and you are done (you will need a small punch). Made of hardened tool steel peened black tough coat finish.