The Sealey 56 Piece Screwdriver Bit Set is a comprehensive screwdriver bit collection designed for professional tradespeople and serious DIY enthusiasts requiring specialist fastener solutions. Manufactured from Chrome Vanadium 6150 steel, each bit is hardened to 52-53 HRC and tempered for enhanced strength and longevity. This heat treatment process ensures the bits can withstand high torque applications whilst resisting wear and deformation during regular use. The set provides exceptional versatility with long and short versions of security TRX-Star, hex, ribe and spline bits, covering a comprehensive range of sizes. Two Chrome Vanadium steel drive adaptors (3/8" and 1/2" square drive to 10mm hex) enable seamless compatibility with ratchets and impact drivers, making this set ideal for automotive mechanics, maintenance engineers and general contractors working with specialist security fixings. The high-impact storage case features an innovative inclined tray design that presents each bit at an angle for rapid identification and selection, reducing downtime on the job. This organised storage solution helps maintain bit condition and ensures nothing goes missing between jobs. Features and Benefits: • Chrome Vanadium 6150 steel construction hardened to 52-53 HRC for durability • Long and short bit lengths (30mm and 75mm) for varied access requirements • Security TRX-Star bits for tamper-resistant fasteners • Dual drive adaptors compatible with 3/8" and 1/2" square drive tools • Angled storage tray for quick bit identification and selection • Lifetime guarantee for long-term reliability Specifications: Brand: Premier Contents: Security TRX-Star* Bits; T20H, T25H, T30H, T40H, T45H, T50H, T55H, T60H (1 each 30 & 75mm), Hex Bits; 4, 5, 6, 7, 8, 10, 12mm (1 each 30 & 75mm), Ribe Bits; M5, M6, M7, M8, M10, M12, M14 (1 each 30 & 75mm), Spline Bits; M5, M6, M8, M10, M12 (1 each 30 & 75mm), Drive Adaptors; 3/8"Sq x 10mm Hex, 1/2"Sq x 10mm Hex Drive: 3/8", 1/2"Sq Nett Weight: 2.45kg