Klein Tools 32543 Replacement Bit, Tamperproof TORX #25 and #27 Fits Klein Tools 2-in-1 (67100), 10-in-1 (32477), 11-in-1 (32500) and 10-Fold (32535-32539) Screwdrivers Contains two (2) bits with TT25 and TT27 Tamperproof TORX tips Precision-machined tips for exact fit into fastener Klein offers a lifetime warranty on material defects and workmanship for the normal life of the product TORX is a registered trademark of Acument Intellectual Properties, LLC