Easy to use: The aluminum alloy positioning block can be moved to the desired position. You can use a marking template to draw a perfect horizontal line while sliding along the working edge. Time saving and efficiency improvement. High measurement accuracy and readability: 0-30 measurement range is possible with high accuracy. With the laser engraved metric scale and matte, non-glare surface, you can easily read the ruler. The precision of the scale ruler, 45/90 degree/angle drawing woodworking tools to the line.Specially designed shape which is convenient to use. Widely Used: The steel woodworking gauge is suitable for both length and width measurements as well as a depth gauge, altimeter, etc Ideal measuring tool for carpenters. Material: aluminum alloy + stainless steel, stainless steel ruler: 330 x 270mm, steel ruler measuring range: 0-300mm, weight: 160g