I designed this tool after realizing the need to measure the depth of holes and mortises. I would often grab a pencil, bamboo stick or small piece of wood to perform this measurement. This haphazard method of measuring depths convinced me that there had to be a better way. The components of the depth gauge are a solid block of tiger maple with an integral stainless steel knurled thumbscrew. A 6 inch long, 1/8 inch diameter stainless steel rod is used to measure the depth.
The hardwood block is designed with a sufficient bearing surface to be placed over an edge without tipping. A stainless steel rod slides effortlessly through a precision hole drilled into the hardwood block. The knurled thumbscrew locks any adjustments in. The depth gauge can be used to measure the depth of a hole or a mortise or to transfer a depth measurement from one board to another. The depth gauge can be used either vertically or horizontally through use of its large bearing surface in either axis. Oiled finish.
Depth Gauge width, height – 3.25 inches, 1.5 inches
Depth Gauge thickness – 1.125 inches
Depth Gauge Rod length, diameter – 6 inches, 1/8 inch