The BlueSpot 15 Piece Torx Bit Set is drop forged from heat treated chrome vanadium steel for increased durability. Bits have 30mm and 75mm (T20, T25, T30, T40, T45, T50 & T55) length for increased range and precision. Suitable for hand tools. Contains: 1pce ½” Drive Adaptor. This Torx Set Comes with BlueSpot Lifetime Guarantee. Register at BlueSpot website. Manufactured from chrome vanadium steel for increased durability. Suitable for hand tools. Ideal for use with 1/2” drive tools. 30 and 75mm bit lengths. Brand: BlueSpot (Comes with BlueSpot Lifetime Guarantee. Register at BlueSpot website). .