Ref. : FBLP.01.BH.25 / FBLP.01.BH.26S / FBLP.01.BH.27 FBLP.01.BH.28Here is a group of clasps that comes from the USA. Basic construction FBLP.01. BH.25. With double security in 8 - the FBLP.01. BH.26S. The blade is folded so as to have a large reaction surface during operation. This increases the life of the clasps. The two clasps FBLP.01. BH.27 and FBLP.01. BH.28 are with a specific blade cut. In the first case a void is created in the middle of the blade that can be used to place stones on the box. In the second case it is simply a saving of material.