The Nylon Brushes are constructed of a material that is unaffected by most modern powder and copper solvents. This resistance is a benefit over bronze brushes. The bristles are designed to be very ridged providing maximum bore scrubbing performance. Molded hinge top storage box included. Threads are industry standard: 8-32 on .22 cal through .45 cal. The .17 cal has 5-40 threads.
Calibers included:
.17
.22
.243/6mm
.25
6.5mm
.270
7mm
.30
8mm
.338
.35
.375
.40/.416
.44/.45