The Api+ Osteotomes Concave With Stoppers Set of 10 is expertly designed for closed sinus lift procedures, particularly in challenging posterior maxillary regions. Each osteotome features a concave tip, ideal for gently pushing graft material into the sinus floor while minimizing risk of membrane perforation. The instruments are equipped with depth-adjustable stoppers to ensure controlled penetration and predictable outcomes. Manufactured from surgical-grade stainless steel, these osteotomes offer durability, corrosion resistance, and optimal tactile feedback. The set includes a range of diameters for progressive site preparation, making it an essential tool for clinicians performing lateral sinus elevation and atraumatic ridge expansion.