Our butterfly deployant clasps enable you to quickly remove and put your watch back on. This will also help to reduce wear on leather straps. Free fitment on our straps and we'll also provide you with the original tang buckle in case you decide to switch back. Leave a note at checkout and we'll fit this for you! Features: Squeeze button mechanism to release 304 Grade Stainless Steel Size advice: Check the product description of the strap you're ordering. There will be a table which will say the buckle width. This is the clasp size that you need.