Troika Construction Tool Ballpoint Pen is a spirit level, a ruler, a screwdriver, a capacitive stylus and a pen. With the capacitive stylus, you can doodle on your tablet or paphlet without it feeling like youre finger painting. The screwdriver attachment is stored away safely under the stylus when not in use, and the stylus itself can be attached to either end of the pen so it doesnt get lost when you are busy driving screws. Why, you might ask, do I need a screwdriver in my pen. We can nott say for sure, a Q Branch gimmick perhaps, but it sure does come in handy when it comes to changing the refill. A ruler is one of those things that is rarely around when you need it, and with the spirit level, at least you will know that the desk is level if you can bring yourself to put the pen down. Twist the front section to retract the refill when not being used for writing. This section also pulls out of the pen to facilitate refilling when necessary. As the barrel is made from brass, the pen has a reassuring weight to it as well as being near indestructible. Hexagonal barrel wont roll away when not in use and is comfortable to hold when writing.