I've purchased these pens in the past from Office Depot and haven't had any problems. However, I used these pens one time and the part where the pen screws together, split on the outside and now the pen won't stay together and is unusable. The ones I bought previously, I've had for years and this never happened. These pens from Amazon seem to be made of much cheaper, flimsy plastic. All 3 pens split open and broke. Very disappointing. If you really like these pens, I suggest buying them at an office supply store instead, the ones on Amazon are junk.