Quick adjustment and locked-in precsion. Just three steps to your precise dimension with the adjustable setup block. Deprss the quick-adjust buton and slide the reference surface up or down until it's close. Use the micro-adjust to dial in your exact dimension, then tighten the locking knob. lt's that easy. Two scales provide mutiple applications. The TOP scale measures the distance from the bottom of the base to the top of the refrence plate. You can use that to set the distance between the bottom of a drill bit and table of you drill press. The BOTTOM scale measures the distance from the bottom of the base to the bottom face of the referene plate. lt's perfect for adjusting the height in your router table or the depth of cut on your table saw. The rererence plate extends away from the body of the tool, giving you lots of alignment options. Specification: Material: Aluminum alloy + stainless steel Adjustable Range: 1/64inch to 1-1/16inch Feature: 1. Aluminum Alloy Material: Setup blocks height gauge is made of aluminum alloy material, durable, not easy to damage. 2. Scope of Application: Essential tools and equipment for construction, woodworking, and home DIY, and the perfect gift option for those enthusiasts. 3. Faste and Accurate: Easily set the height of fences, blades and other cutters as needed, faster and more accurate than using a combination ruler. 4. Save Time: Setup blocks gauge gives you a good idea of how to save time and is a very useful tool to make your woodworking projects easier. 5. Good Workmanship: Exquisite workmanship, beautiful appearance design, small and portable size, providing you great using experience. How to Use: 1. Adjust the Height: Press the quick adjustment button, then slide the reference surface up or down to your desired height. 2. Accurate Adjustment: Use the fine-tuning knob to adjust to the exact size that meets your requirements. 3. Fix the Knob: Tighten the knob to lock the height. Package Included: 1 X Setup Block Height Gauge