Wera-05053923001-897-4-R-Rapidaptor-Bi Torsion-Universal-Bit-Holder-Wera-05053923001-P-A-universal-holder-for-bits-with-frac 14-in-hexagon-drive-as-per-DIN-ISO-1173-C-6-3-&-E-6-3-ISO-1173-P-P-The-Wera-Bi Torsion-holder-has-a-torsion-spring-that-absorbs-peak-loads-during-screwdriving-jobs-considerably-extending-the-service-life-of-the-bit-P-P-Wera-s-Rapidaptor-technology-allows-bits-to-be-attached-without-any-need-to-actuate-the-sleeve-The-removal-of-the-bit-is-simple-just-by-push