Bergeon offers this high quality watch case opener to open all kinds of watches with snap backs. This precision case opener knife can be used by hobbyist, model makers, eye glass repair, electronic repair and watch repair of all kinds. The tool works well for opening watch case backs in order to replace batteries or repairs timepieces. The Case opener features a large firm grip metal handle, a knurled handle measuring 110 mm, two grooves for index finger and thumb and a stainless steel blade measuring 32 mm. (Blade is replaceable) Swiss Made Great Tool!