The BlueSpot Tools 9 Piece Impact Spline Bit Set is designed for the removal and application of spline fittings in various mechanical and automotive tasks. Each bit is manufactured from heat-treated, hardened, and tempered S2 steel to provide increased durability and strength during use. This set is compatible with 1/2 inch drive ratchets, breaker bars, and air tools, making it a practical addition to a workshop tool collection. The set includes a comprehensive range of sizes to accommodate common spline fittings.