The Spyderco UK Pen Knife is a reliable and lightweight everyday companion and easily handles all cutting work with its flat grind. The blade made of CTS BD-1 does not lock, so it is a slipjoint knife without a mechanical locking mechanism. If the blade is to be closed, some pressure must be exerted on the back of the blade to overcome the resistance of the spring that retains the blade. The black handle is made of glass fibre reinforced plastic. With convertible clip (l/r).