Hi, this model was created by a problem. My chronometer, the one you see in the photo, had this problem: every time i put it in my bag, changed the mode and was very frustating. So this cover prevent the buttons to press around things in the bag, it snap with screw holes, i just suggest to be careful whem you put it because the two pins could break. My chronometer is this https://www.amazon.it/Faviye-Multifunzione-Cronometro-Portatile-Allenatori/dp/B07S2SLMTR/ref=sr_1_10?crid=6DLKO2R9CT2S&dib=eyJ2IjoiMSJ9.o2ifeXvXIcnyfEBeifLCypHXQ977uWe26cP-mq1SVKo-0Hqj_bGqfc4bsULiTObI8sX7LUuW6BzUjPe6Rln_qEiuTk4rbnmwy3BY4Rh1qPQceaKpZaWFBZY034cW_zLs6mSZmCH31oXPTCRMvHtFdsLVfYK7unANRE9ldX-aqcjfAoPXcNV_TK2-zHMu9cj4P4hYjvCCugNIYT32rgGGYHrAinhCTS2SxpQHnCrUlLnpi5RAOUtHb8gcO-tNoYNK2qDtCqFZUPSJvvnabXuYwPp0lU1MEM3cI9-7DUZ0EOQ.RGQ4OBcb6YjG2W7FQBuUWvyg3wiK6hjwgX1qAwcELqw&dib_tag=se&keywords=stopwatch+cronometro&qid=1775918683&sprefix=stopwat%2Caps%2C265&sr=8-10