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Timber inserts are cylinder-shaped inserts used to provide a threaded hole into wooden materials. They have an internal thread to accept male threaded fasteners and an external coarser thread that enables them to be driven and fixed in a predrilled holes using an Allen wrench. They are generally used in applications wherein frequent screwing and removal of fasteners are needed while preserving the integrity of the wood. Similarly, they are also used to provide exact screw positioning in wooden furniture assembly.