Ref. : FBLP.01. BH.01 / FBLP.01. BH.02 / FBLP.01. BH.03 / FBLP.01. BH.04Here is a collection of interesting clasps. FBLP.01. BH.01 is the classic clasp we learn at school but the FBLP.01. BH.02 is easier to achieve. The clasps FBLP.01. BH.03 and FBLP.01. BH.04 comes from the 60s and they are for pearl necklaces and bracelets. Their construction allows closure with a hand willow. Safety is superior to other models since the commitment is done in two stages. See FBLP.01. BH.04 GIF below .