Storm Tactical Pocket Data books were designed for use in the field and for tactical rifle competitions where a lightweight, portable Data Book is needed. Developed with the help of elite military and law enforcement units. Measuring just 5" x 3.7", Storm Tactical Pocket Data Books will fit in a pocket, large stock pack, backpack outer pocket, etc. They have a sturdy Polydura Cover and heavy duty plastic coils. Pages include: Come-ups, Stationary IPSC Torso, Blank Target, Zero / Calls, Dedicated Cold Bore, Diamond Target, Circle Target, Reticle Hold, Round Count, Range Estimation Formulas, Object Size Charts,Wind Chart, and Notes Pages. Made in the USA.