Robust Bit-check From Wera With Extremely Hard Bits, For Universal Use. Bitorsion Bits With Torsion Zone, In Which Kinetic Energy Is Diverted During Load Peaks. With Soft Bitorsion Zone To Prevent Twisting Of The Bit Tip Under High Loads. This Significantly Increases The Lifespan Of The Product. With Matching Holder To Extend The Lifespan. Equipped With Rapidaptor Technology, To Be Able To Place The Bits Without Having To Operate The Sleeve. To Remove The Bits Again, You Only Have To Slide The Sleeve Forward - So You Can Quickly Change Bits Even With One Hand. For Inserting Bits With 1/4 in External Hexagon Drive According To Din Iso 1173-c 6.3 and E 6.3. For Mounting In The Screwdriver Or In The Drill Chuck Of The Electronically Controlled Drill.