Gtl 3 professional the bosch gtl 3 professional tile laser is an indispensable tool for all tilers projecting two laser lines at an angle of 90 as well as a third line at 45 that makes this tile laser a handy companion for accurate alignment and laying of wall and floor tiles this tool is also very useful for measuring angles and laying tiles in larger spaces it comes supplied with a target as standard allowing it to handle jobs up to a 20 m range lay tiles fast thanks to the additional line a