I have one, mine is 4.25" closed with main sheepsfoot blade and two pen blades at the other end. The main blade rests on two backsprings, the pen blades on one each. It is well built, and has well ground blades. I got lucky and picked it up on fleabay for about $25. The only fault I can find is that if I let the main blade snap shut hard, it hits the center of the backspring.