Made of aluminum alloy, anti-drop, durable. Laser calibration, high precision, clear reading. Can be co.ukeely deformed and used in different ways. Can be used for ceramic tiles, glass, marble, wood planks. This product is mainly used for opening and positioning, which is very suitable for laying tiles. Features: 2 units: cm and inches. Made of aluminum alloy, anti-drop, durable. Laser calibration, high precision, clear reading. Can be co.ukeely deformed and used in different ways. Can be used for ceramic tile, glass, marble, wooden planks. This product is mainly used for opening and positioning tiles, which is very suitable for laying tiles. Features: Material: aluminum alloy. Color: black. Dimensions of each ruler: 175 x 25 x 2.3 mm. Weight: 370 g. Content: 1 x 12 folding rulers.