Easton???s Deep Six Nocks feature a compound-compatible large throat design, stiffer, shorter configuration, and extreme durability as well as unmatched precision. As a result, for a decade now Deep Six nocks have been well known as a component contributing to discerning bowhunters??? achievement of tack-driving accuracy with Easton 4mm shafts. Easton 4mm Microlite Red Nock 12pk 823012