Description It is an essential tool for precise drilling that pays for itself by preventing errors and material waste. The stop ring can be set at any point of the drill shaft, and the adjustment is convenient and quick. It provides precise drilling results by preventing under-drilling or over-drilling. Colour: Black. Material: Steel. - Dimensions: approx. 2 * 2 * 0.8 cm/0.79 * 0.79 * 0.31 inches (L * W * H). It is an essential tool for precise drilling and pays for itself by preventing errors and material waste. The stop ring can be set at any position on the drill shaft, and the adjustment is convenient and quick. Provides precise drilling results by preventing under- or over-drilling. Includes hex wrench for tightening and loosening collar.