Wera 780B/2S Extra Strong 3/8" Square Drive to 5/16" Hex Screwdriver Bit Holder

The Wera 780B/2S is a 3/8" square drive to 5/16" hex screwdriver bit holder, designed to adapt standard 3/8" square drive tools for use with 5/16" hexagon shank bits conforming to DIN ISO 1173-C 8.

Built to Wera's connecting series 2 specification, this adaptor is ideal for contractors and tradespeople who need to use screwdriver bits with a ratchet or torque wrench equipped with a 3/8" square drive. The ball stop groove provides a secure, positive retention of drive tools during use.

The extra-strong retaining ring is a notable feature, offering a more robust hold than standard adaptors — particularly useful in demanding site conditions where security and reliability matter.

Features and Benefits:
• Converts 3/8" square drive to 5/16" hex bit drive
• Compatible with bits conforming to DIN ISO 1173-C 8 (Wera connecting series 2)
• Extra-strong retaining ring for a secure, positive fit
• Equipped with ball stop groove for reliable tool retention
• Compact 30mm length for use in confined spaces

Contents:
780 B 3/8" Adaptor, 780 B/2-S x 5/16" x 30mm

Specifications:
Drive: 3/8" square socket
Bit Drive: 5/16" hexagon
Length: 30mm
Standard: DIN ISO 1173-C 8