The tips of these clips regularly fall off, rendering the product useless. Tips are essential to keep the to ensure proper pressure on the work piece and continue to function to mitigate scratches/damage to the work piece The problem is not unique to one clamp size although it appears to be worse with the two larger sizes It speaks of easy opening and closing Each of the 3 sizes I have have the clips pop out randomly and get lost easily.(Note the photos above.) For comparison I took a photo of a working alternative clamp I've had for years.Note the Metal rivet holding the flat piece securely attached to the jaws of the clamp.This design is imperfect and makes the clamp inefficient at best.At worst these clamps will scratch the workpiece if the tips suddenly rebound.