Premium LocatorBrass positioning block can be adjusted to your desired position, then just tighten the screws, easy to use. Can be used on all types of steel ruler. Premium MaterialHigh quality stainless steel DIY measure, accuracy up to 0.5mm, the stop easily passes through the ruler. Stable performanceA good measuring tool for all kinds of woodwork. It's easy to put on and take the measurement and transfer it as you like. Once set, you can draw an infinite number of times. Easy to Use The brass positioning block can be adjusted to the position you want, then just tighten the screws, easy to use. Can be used on all types of steel rulers. With the steel ruler, all measuring work can be done with high accuracy within the measuring range of 0-30cm. Wide range of applicationsCompact and lightweight, with a fence Fully removable, the Wfix Scribing Tool is a simple and effective measuring and marking tool for professionals and enthusiasts of woodworking, crafts, DIY projects, and more.