Clockwise Tools DDGR-0105 is a premium quality and lower price dial depth indicator. It is highly recommended for home DIY using as well as professional using. The measuring Range is 0-1 inch. Its accuracy is ±0.0012" and resolution is 0.001". The stem diameter is 3/8". It has a large dial face (d: 2"). Indicator is equipped with flack back, and the lug back is included in the box (hole size 6.5mm). It comes with 6 extensions (the sizes are 1"-2", 2"-3", 3"-4", 4"-5", 5"-6", and 6"-7") and 2 extra tips for small hole (one 0.078" diameter x 1" long and one needle point x 1" long). The base is adjustable by using the hex wrench comes with the package. For more information please follow us on Instagram @officialclockwisetoolsinc.