The RETRAKT is a high-quality, American made pen body with an all-metal "click" mechanism. It weighs 1.0 ounces and is 5.625" in length (overall). This pen body uses the popular Pilot G2 refill (or Parker ballpoint compatible) and features a stainless clip and hardware. We designed the RETRAKT from the ground up to be the last pen you'll ever need. Each pen is machined from 6061-T6 aluminum, in our shop, right here in the good ol' USA. The click mechanism on the RETRAKT is a precision mechanical assembly. Agressive clicking or “flicking” of the mechanism can cause damage to the internal workings of the assembly resulting in poor performance. This is usually indicated by a gritty feeling or by irregular functionality. This type of damage is not considered normal wear and tear and will not be warrantied as being defective. Replacement parts are available, but at a cost to the customer.