1/4" Dr. Tamper- Bit Socket, TT27 Torx Product Details Features and Benefits: . DURABILITY: bits made of premium S2 alloy steel for superior hardness that reduce wear-outs and insure longevity. 0.25 in. Hex Shank. PRECISION BITS: precisely and automatically machined bit tips to ensure accurate size, chamfered bit ends insert smoothly into fasteners and protect both bits and fasteners from damaged edges. Tamper Proof Torx Bit, 1/4 Hex Shank, Internal TT27, with Security Hole in Center. Determination of damage by impact tools is subject to OTC evaluation and discretion. T27 Tamper Torx, 1/4. 5924 No -