A clasp is configured to permanently interlock around a flexible strip of material and includes first and second interlocking members. Each interlocking member includes a plurality of hooks and a corresponding plurality of recesses, where the recesses of one interlocking member receive the hooks of the other interlocking member to secure a band within the clasp between the interlocking members. The recesses can be completely internal to the clasp to prevent external tampering. Each of the interlocking members can include various protrusions and ribs that compress and secure the band within the clasp, so as to prevent movement of the band between the interlocking members when interlocked.

A buckle includes two coupling modules coupled separably to each other. Each of the coupling modules includes a main unit including a hook member and a coupling member that has a retaining portion, and an operating member having an operating portion and a pushing portion. The hook member of each of the coupling modules is engaged with the retaining portion of the other one of the coupling modules. The operating portions of the operating members of the coupling modules are movable toward each other, during which the pushing portion of each of the coupling modules pushes the hook member of the other one of the coupling modules to disengage said hook member from the retaining portion of the coupling module.

A quick release buckle includes a first connecting member, a second connecting member, and a locking member, where the first connecting member is provided with a first chamber, and the second connecting member is provided with a second chamber; the locking member is provided with a first locking part and a second locking part connected to each other; the first locking part is located inside the first chamber, and is connected to the first connecting member through a reset mechanism; and the second locking part is detachably connected to the second chamber.

A quick release buckle includes a first connecting member, a second connecting member, and a locking member, where the first connecting member is provided with a first chamber, and the second connecting member is provided with a second chamber; the locking member is provided with a first locking part and a second locking part connected to each other; the first locking part is located inside the first chamber, and is connected to the first connecting member through a reset mechanism; and the second locking part is detachably connected to the second chamber.

A buckle includes two coupling modules coupled separably to each other. Each of the coupling modules includes a main unit including a hook member and a coupling member that has a retaining portion, and an operating member having an operating portion and a pushing portion. The hook member of each of the coupling modules is engaged with the retaining portion of the other one of the coupling modules. The operating portions of the operating members of the coupling modules are movable toward each other, during which the pushing portion of each of the coupling modules pushes the hook member of the other one of the coupling modules to disengage said hook member from the retaining portion of the coupling module.

A clasp is configured to permanently interlock around a flexible strip of material and includes first and second interlocking members. Each interlocking member includes a plurality of hooks and a corresponding plurality of recesses, where the recesses of one interlocking member receive the hooks of the other interlocking member to secure a band within the clasp between the interlocking members. The recesses can be completely internal to the clasp to prevent external tampering. Each of the interlocking members can include various protrusions and ribs that compress and secure the band within the clasp, so as to prevent movement of the band between the interlocking members when interlocked.

A clasp is configured to permanently interlock around a flexible strip of material and includes first and second interlocking members. Each interlocking member includes two hooks and two recesses. Each of the hooks of the first side are arranged to engage and interlock with one of the recesses of the second side and each of the hooks of the second side are arranged to interlock with one of the recesses of the first side, so as to prevent movement between the interlocking members when interlocked.

A buckle for binding two items together that includes a male plate and a female plate. The male plate further includes a locking member that is movable between a locking position and an unlocking position, wherein the locking member in the locking position interacts with the locking mechanism to lock the male plate to the female plate along a longitudinal axis that is perpendicular to the binding axis. The female plate includes a locking mechanism that includes two arms extending from opposing ends of the female plate respectively and is adapted to slidably receive the male plate therewithin to secure the male plate face-to-face to the female plate along a binding axis.

A watchstrap including two separate strap sections, a first section including one or more holes in correspondence to which fastening a second section, to fasten the strap and the watch around a wrist. The strap includes a fastening system with a male part removably fixed to the first section through one of the holes to set a predefined width of the strap, and a female part, fixed on the second section and provided with a receiving seat for snap-engagement of the male part, for an automatic and pre-adjusted fastening of the strap around the wrist, the female part for releasing the male part, to open the strap. Also a fastening system for the strap of a watch and a watch comprising the strap with the corresponding fastening system.