Features and Benefits: Faster shots- Allows shooter to instantly view/access ballistic data. Securely mounts to Tactical rifle buttstocks. Prevents cards/data sheets from getting lost. Sized to fit "Ballisiticard Delta-2" cards. Unique flip-up feature allows viewing of bottom side of card without having to remove from carrier. Anti-reflective window bordered in topgrade Nylon binding. Double stitched throughout. Fits most rifles (AI, Remington 700, HS Precision, McMillan Hunting/Tactical stocks).