Ref. : FBLS.01.BC.33 / FBLS.01.BC.34 / FBLS.01.BC.35Clasp FBLS.01. BC.33 is designed for bracelets (its shape marries the arm). The model FBLS.01. BC.34 is spring loaded. It is a safe design and easy to handle. It has a good coefficient 3 F. The FBLS.01. BC.35 comes from watchmaking. Both hooks operate with a common spring.