Combination end cap/magnetic clasp with a twist-lock. Insert one part into the other, and the strong magnets create a firm closure. Give it a small turn, and the two pieces lock together so it will not come apart even with an unusual pull or other stress. The ease and convenience of a magnetic clasp with the extra security of the locking mechanism. Ideal glue-in clasp for kumihimo braids or round leather strands. Made of solid brass with a platinum or silver plating. The overall size is 15mm x 15mm, and the inside hole diameter is just under 3mm.