The whole, non-roller buckles used on the Hadley range should prevent the fastening tabs from accidentally coming undone and getting lost, but just in case, we offer them as an accessory.
In use, we recommend the strap is adjusted to length by using the buckle; the Quick Release System, i.e. the teardrop shaped hole which slips over the brass stud, is used for regular opening and closing of the fastening. This way the straps are unlikely to get lost and you will gain maximum benefit from the QRS. The straps are sold in pairs.