Diamond segmented grinding head.  Use this for grinding cement, not to be used on green concrete.  Teq-lok twin full rectangular segments are included with the rental of the floor grinder.  Conventional two segment for mastic and thin coating removal.  Also used in the first steps in concrete polishing.  This is a medium bond diamond segment, 30/40 grit.  Not to be used on soft or green concrete please contact General Rental for further assistance if renting for grinding soft concrete.  The teq-lok system is a user friendly system for changing tools on rental grinder.  It allows for quick changing of tools for scraping grinding and even polishing.  The tool simply slips into the slot on the floor grinder plate and is pulled or tapped outward to seat the tool securely.  Never hit the diamond segment directly when removing or installing.