The Superslick AlphaSynth key and linkage oil is a safe, effective synthetic oil designed for use with woodwind keys, brass instrument ball joints and linkages. This high-quality and long-lasting lubricant provides outstanding wear, rust and corrosion protection plus oxidation stability to keep your instrument in proper playing condition. The needle-point tip applicator allows for precision placement of lubricant even into the smallest of openings on intricate instrument parts. This AlphaSynth lubricant is USA made and is completely safe for classroom use, making it a favorite of music teachers, repair shop technicians and players alike.