The IRWIN Impact Pro Performance Magnetic Torsion Bit Holder has an extended torsion zone that helps to maximise bit life and turning force when used in extreme applications. For use with impact drivers and 25mm impact bits. Length: 75mm Features: For use with impact drivers 25mm impact bit compatible Extended torsion zone for maximum life and turning force Specifications: Dimensions: H:16.0 x W:4.8 x D:1.8 cm Colour: Silver Model Number: IRWIW6064603