Traditions uses dinky little locks on their rifles, more suited to pistols really than rifles. They take little 5/8ths square flints. The first measurement is the width, followed by the length. I second Track of the Wolf for English flints. Very good quality. I did have one issue one time though. I ordered 3/4 by 7/8ths flints for my Siler and L&R locks and they sent me 3/4 square. I returned them.