Bosch gtl3 3 line wall and floor tile laser bosch 0601015200 the bosch gtl3 3 line wall and floor tile laser has been designed to speed up the task of accurately aligning wall floor and ceiling tiles its 3 lasers produce lines that intersect at 90 deg and 45 deg for perfect positioning even when tiles are placed diagonally bosch 0601015200 gtl3 3 line wall and floor tile laser