The tip is so long that you can easily get through brackets for screw holes, for example. Also ideal for use as a replacement for the carpenter's pencil. For marking most surfaces/materials, e.g. smooth surfaces such as tiles, clinker and glass, etc. Mark 100 mm depth in a 3 mm hole. Mark 145 mm depth in a 6 mm hole. Shirt / trouser clip. Built-in pencil sharpener on the case for maximum precision. Long robust metal shafts.