1. Blue Point Fasteners .25 caliber Yellow powder loads, power level 4. 2. 100 loads per box. 3. For semi-automatic .25 caliber strip fastening lovelocity tools. 4. Recommende to be used for Blue Point BP-35 tool and all other .25 caliber strip loads powder actuated fastening tools. 5. Fastening drywall track, electrical fixtures to concrete/steel, conduit clip to concrete. 6. High quality, low residue after shoot 7. Precision power range. Caution: Please read and follow the warning on the box before using this product. Failure to follow warning and the instruction of tools can result in some serious injury, so please be more careful. Power Level Guide: Power level is designated by the load level number marked on each box, also by the color of the box and each powder load. As the number increases, the power level goes up.