Tolsen 20385 40-Piece Screwdriver Bit Set

Tolsen 20385 40-Piece Screwdriver Bit Set is a comprehensive, professional-grade driver bit assortment designed for automotive repair, machinery maintenance, structural fastening, and heavy workshop applications requiring high-torque hex drive profiles.

Technical Specifications

Key Features

• Dual-Length Profile System: Includes both 30mm short bits for tight, restricted spaces and 75mm long bits for deep-recessed fasteners.

• Heavy-Torque Hex Shanks: 10mm hexagonal shanks prevent cam-out and slipping inside the socket adapters, allowing maximum torque transfer from 3/8″ and 1/2″ ratchets or impact drivers.

• Industrial Grade Alloy: Heat-treated Cr-V / S2 steel construction resists rounding and shearing under continuous heavy mechanical loads.

• Dual Drive Compatibility: Features 3/8″ and 1/2″ square drive adapter sockets to integrate seamlessly with standard ratchet handles and breaker bars.

• Organized Storage: Stored in a durable metal or blow-molded case with labeled slots for immediate size identification and secure transport.

Set Configuration / Included Items

• Hex Bits (30 mm & 75 mm lengths):

  • H4, H5, H6, H7, H8, H10, H12

• Torx / Star Bits (30 mm & 75 mm lengths):

  • T20, T25, T30, T40, T45, T50, T55

• Spline / Triple Square Bits (30 mm & 75 mm lengths):

  • M5, M6, M8, M10, M12

• Drive Adapters (2 Pieces):

  • 1/2″ Square Drive × 10 mm Hex Bit Holder

  • 3/8″ Square Drive × 10 mm Hex Bit Holder