1. First of all, butterfly buckle is a special lock for watch strap, which is used in metal and belt watch. Usually the material is stainless steel, there are single open and double open forms, and with a button lock, the structure is more complex.
2. Separate the buckle to both sides, break off the top clip, put the long end strap through the buckle, adjust the length of the strap according to the size of the hand, align with the locking hole, insert the small needle into the hole, hear the sound, return the short side strap to the insertion ring, hear the sound, finally return the long end strap, and then press the buckle tightly.
3. Finally, the advantages of butterfly buckle: avoid the watch strap bending, wear more comfortable, lock more secure, better support and control of the watch.
