The Blue Spot Tools Impact Spline Bits are manufactured from S2 Steel for increased durability and strength. This set includes the most widely used spline sizes and are ideal for removing and applying spline fittings. The bits are heat-treated hardened and tempered. They can be used with ratchets breaker bars and air tools. This 9 piece set includes the following sizes: M6 M8 M9 M10 M12 M14 M16 and M18.PTDB/S1496
