The Dasmiro 5" Adjustable Keel Roller Assembly is engineered for enhanced stability and heavier boat trailer applications. Designed to fit 2.5"–3.5" square trailer tongues, this heavy-duty system is ideal for medium to large boats requiring stronger keel support and improved loading control. Built with an adjustable height and width mounting system, it allows precise positioning to ensure optimal keel alignment across different trailer setups. The reinforced clamp design provides a secure and stable fit, reducing movement and improving safety during boat loading and launching operations. Manufactured from premium galvanized steel, this bracket offers superior corrosion resistance for long-term outdoor and marine use. The high-strength roller helps absorb shock and reduces direct impact on the hull, ensuring smoother and safer trailer performance under heavier loads. Recommended for 2.5"–3.5" trailer tongues, this 5" version is the preferred choice for users with 3" square trailer tongues who need increased stability and stronger support. It is especially suitable for medium to large boats, frequent trailering use, and demanding marine environments. Built for durability, stability, and long service life.