【MATERIAL】Hole marking gauge made of high quality stainless steel, strong and durable, wear-resistant and moisture-proof. 【FINE WORKMANSHIP】Edge after deflashing treatment to avoid safety problems caused by incorrect use. Larger ABS knob makes the operation slider convenient and quick to move when moving, easy to adjust. 【HIGH PRECISION】The carpenter measuring tool has high scale accuracy, accurate reading and easy to read, high efficiency and easy to use. p> 【MEASURING RANGE】The measuring range of the hole ruler is 0-250mm, which is enough to meet your measuring needs.