Bohning Blazer F Nock Neon Orange 12 pk.. Made of durable impact resistant polycarbonate. Double lock throat for added security and a clean release. Package Contents: Bohning Blazer F Nock The F nock is a small press fit nock designed for shooters that shoot with a D loop on the string. Made of durable impact resistant polycarbonate. Double lock throat for added security and a clean release.