The Original DISC 209 Muzzle loader Primer Ignition System makes loading and shooting easier. Absolute confidence is a feeling only the Knight shooter knows. We invented dependable DISC? ignition in 1997?black powder shooters called it ?the best ignition system on the most innovative muzzleloader of our time.? Unlike traditional percussion caps the DISC 209 primer ignition system uses our patented primer discs to house 209 shotshell primers. The result is lightning-hot ignition that deilvers MAGNUM performance. Whether you?re hunting in driving rain to arctic cold you can count on the DISC system to provide more performance than other ignition systems. With the Original DISC you simply open the bolt drop in a pre-primed DISC and you?re ready to go. Pack of 100 Fits all 209 shotshell primers. Fits the Knight Original DISC Custom Molded In The USA