Proto 11 Piece 1/4" And 3/8" Drive Torx Bit Set J5239P-SBD

Proto's professional-grade 11-piece Torx® insert bit set designed for versatility across both 1/4-inch and 3/8-inch drive applications. This industrial-strength set is engineered for high-torque mechanical tasks, providing a comprehensive range of Torx® sizes that are common in automotive, aerospace, and heavy machinery maintenance. The bits are manufactured from high-strength steel to resist cam-out and ensure a precise fit in fastener heads. The set includes two specialized bit holders and nine high-alloy steel insert bits, all featuring a full polished finish for superior corrosion resistance and easy cleaning. The inclusion of both 1/4-inch and 5/16-inch hex shank bits allows you to tackle a wide variety of fastener sizes using your existing 3/8-inch drive ratchets and extensions. The entire set is housed in a durable one-pocket tool roll for organized storage and portability. The shipping weight for this 11-piece set is approximately 0.36 lbs.
Key Features
Comprehensive 11-piece set includes Torx® sizes T10, T15, T20, T25, T27, T30, T40, T45, and T50.
Features two 3/8-inch drive bit holders—one for 1/4-inch hex bits and one for 5/16-inch hex bits—for maximum drive versatility.
Manufactured from premium forged steel for industrial-grade durability and high torque capacity during heavy-duty use.
Full polished finish provides professional-grade resistance to rust and environmental corrosion in harsh workshop conditions.
Precision-ground tips ensure a tight, accurate fit in Torx® fasteners to prevent stripping and reduce the risk of cam-out.
Includes a compact, one-pocket tool roll for organized storage and convenient transport within a professional tool chest.
Non-impact design is specifically optimized for use with manual hand ratchets, breaker bars, and torque wrenches.
Large stamped size markings on the bit shanks allow for quick and permanent identification of the correct tool for the job.