Review on 🛠️ Precision Woodworking Marking Gauge Kit - Clarke Brothers Wheel Marking Scriber with 2 Replacement Cutters - Graduated Inch & MM Scale - Solid Metal Bar Scribe Tool for Carpenter by Chris Ledet

Easy to use but the product I received was not square. The copper plate did not fully fit the black cone causing the marker line to move during use. This was easily overcome with an F-clamp (a vise would also work) by squeezing them together with a clamp. Aside from that minor inconvenience (which makes it a 4-star rather than a 5-star device), the marker sensor works great. The installed blade is sharp enough to leave a very noticeable line. It also comes with two extra blades but I can't comment on their quality yet as they are still in the box.