Securing a watch with one hand doesn’t have to be a hassle. Quick, secure, and durable, VARIO’s butterfly deployant clasp or ‘dual-fold clasp’ takes a few minutes to install, but turns securing your watch into a two-second process. Made from stainless steel, these clasps experience minimal wear and tear, and open and close with a simple snap. Available in sizes of 16mm, 18mm, 20mm measure at the buckle end. If you're buying this for our Harris Tweed strap, please choose the following: 18mm Harris Tweed strap - 16mm deployant buckle20mm Harris Tweed strap - 18mm deployant buckle22mm Harris Tweed strap - 20mm deployant buckle If you're buying this for our Italian strap, please choose the following: 18mm Italian leather strap - 16mm deployant buckle19mm Italian leather strap - 16mm deployant buckle20mm Italian leather strap - 16mm deployant buckle22mm Italian leather strap - 18mm deployant buckle If you're buying this for our Crazy Horse strap, please choose the following: 18mm Crazy Horse bund strap - 18mm deployant buckle20mm Crazy Horse bund strap - 20mm deployant buckle If you're buying this for our AE1200 strap, please choose the following: AE1200 strap - 20mm deployant buckle If you're buying this for our F91W strap, please choose the following: F91W strap - 18mm deployant buckle Additional ResourcesAccessories Collection - Fitting Guide - FAQ - Guarantee