The "Winkletronic" Measuring Tool is an electronic device derived from the "Winklefix" Tool. Angles between 0 and 355 degrees can be measured quickly, precisely and reliably, and read off the illuminated digital display. You can even take measurements in difficult positions, and hold function keeps a value on the display. Integrated horizontal and vertical spirit levels. An automatic "switch-off" feature turns the unit off after three minutes of non-use to extend the life of the battery. A pencil may be fitted in one of the measuring points to change the unit into a compass. A truly professional tool for glaziers and builders. Supplied with case.