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

The Wera 780B/2 is a 3/8" square drive to 5/16" hex bit holder adaptor, designed to connect screwdriver bits with a 5/16" hexagonal drive to a 3/8" square drive socket wrench or ratchet.

Manufactured to DIN ISO 1173-C 8, this adaptor is part of Wera's connecting series 2 and allows tradespeople to use their existing hex shank bits directly from a square drive tool — a practical solution when switching between driver bits and socket tools on the same job.

The adaptor features a ball stop groove, which helps secure the bit holder in the square drive and prevents unwanted disengagement during use. Ideal for electricians, joiners, and general contractors who regularly switch between fastening and socket work on site.

Features and Benefits:
• Converts 3/8" square drive to 5/16" hex bit holder
• Compatible with bits conforming to DIN ISO 1173-C 8 (Wera connecting series 2)
• Ball stop groove for secure retention in the square drive
• Compact 30mm length for use in confined spaces

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

Specifications:
Drive Size: 3/8" square
Hex Shank: 5/16"
Length: 30mm
Standard: DIN ISO 1173-C 8