This Wera 15 Piece Impaktor TriTorsion Pz2 Diamond Tipped Impact Rated Screwdriver Bits, Plus Wera 1/4"" Stainless Steel Magnetic Impaktor Bit Holder is designed for heavy-duty use, particularly with impact drivers. The Impaktor bits offer a significantly longer service life compared to standard or Torsion bits, especially when used with the Impaktor System bit holder, lasting up to 10 times longer. This set includes 15 x Pz2 (Pozi-2) 25mm length impact-rated screwdriver bits and a Wera Impaktor Stainless Steel Magnetic Impact-Rated Screwdriver Bit Holder. The bits feature TriTorsion technology for enhanced durability.