889/4 R Rapidaptor Universal Bit HolderProduct Description: Wera 889 4 R Rapidaptor Universal Bit Holder, with strong permanent magnet. Rapidaptor technology has been developed by Wera for rapid bit change without any extra tools and also only requires one handed use. Rapid in allows the bit to be inserted without moving the sleeve, thanks to a self lock mechanism the bit automatically locks in securely. Rapid out allows for the bit to be changed by simply pushing the sleeve forward, this