The Bellstone BHI-1086 Compaction of Soil apparatus is designed to evaluate and ensure optimal soil compaction in various construction and engineering projects. This versatile equipment comes in two standard sizes: 2.5 kg and 4.5 kg, making it suitable for different applications. It operates in conjunction with either a 102 mm (Proctor) or 152 mm mold, allowing for accurate testing. Constructed from high-quality plated steel, the apparatus includes a collar, mold body, and base plate, ensuring durability and reliability during use. Quick-release wing nuts facilitate easy assembly and disassembly for efficient testing. This compaction apparatus is crucial for conducting Proctor tests to determine optimum moisture content, enhancing soil stabilization efforts. Additionally, it serves as an essential educational tool in civil engineering programs, helping students understand soil mechanics and compaction principles effectively.