... Remain quality of fishing and do not trust a Polish manufacturer who throws you a few anchors and a few screws in the box and says he has something really great offer! NO !!! Described as usual and on the packaging, drilled at an eighth drill the hole, ran Latte dowels and screw in ... Conclusion: For a 120 strength anchors and a normal roof batten, flat side, maintenance should actually occur! You can pull the dowels holding the plank out of the stone. It does not work! The screws do not have the correct strength!