Adjustable Setting Block: A single device that can be adjusted to any size between 1/64" and 1-1/16" with an accuracy of 1/64". Easy-to-read scale to quickly locate reference heights and set your cutter height or fence position. Get your filming done quickly and easily. QUICK ADJUSTMENT AND LOCKING ACCURACY: Just simply three steps to set your precise height with the Adjustable Setup Block. Depress the quick-adjust button and slide the reference surface up or down to the specified height. Use the micro-adjust to your exact dimension, then tighten the locking knob. Double Scales Offer Height/Depth Setting: The "TOP" scale measures the height from the bottom of the base to the top of the reference board. Use this to set the distance between the bottom of the drill and the table of the drill press. The "BOTTOM" scale measures the distance from the bottom of the base to the bottom surface of the reference board. It's perfect for adjusting the height of router drill bit or the depth of cut of table saws. The 2 scales provide you multiple applications. Premium Quality: The base and reference board are meticulously machined from solid aluminum alloy, anodized surfacing finish. The adjusting screw shaft is made of high grade stainless steel. Laser engraved scales have a tolerance of .004" total accumulated error. This small handy height setting tool will simplify all your machinery set-up and din't need blocks combination or caculating, also it don't take any big storage space. Compact and Multiple Uses: This handy adjustable setup block has mini size and great function. You can use it to set router bit height, table saw depth, drill depth, saw fence distance, testing the depth of cuts, etc.