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: 0-30cm measurement range is possible with high accuracy. Thanks to the laser engraved metric scale and the non-glare matte surface, you can easily read the ruler. The precision of the scale ruler, 45/90 degrees / angle working tools of line drawing wood.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: 33 Feature: The accuracy of the ruler scale, 45/90 degree/angle linework carpentry tools. The aluminum alloy positioning block can be moved to the desired position, then simply tighten screws, easy to use. With a positioning block, you can now convert any steel ruler into a precision marking tool. The gauge marking is made of aluminum alloy and stainless steel, which is rustproof, durable and sturdy. Specification: Material: aluminum alloy, stainless steel Steel ruler measuring range: 0-30cm Weight: 160g Package includes: 1 x marking gauge 1 x Woodworking Positioning Block