Bit Professional Internal Square Robertson #3, 50 mm, 1/4" E6,3 - Wiha 06639

The Wiha Bit Professional 06639 is designed for the larger Robertson #3 socket (3.3 mm) and delivers reliable torque transfer even at higher loads. The E6.3 drive conforms to DIN 3126 / ISO 1173 and fits all standard 1/4" bit holders.

Benefits

• Tapered tip for fast, precise insertion into Robertson #3 screws
• Through-hardened chrome-vanadium steel for dependable service life in continuous use
• Standard-compliant E6.3 drive (DIN 3126 / ISO 1173) - fits all standard holders
• 50 mm length for universal use in hand and power screwdrivers

Technical data

• Drive profile: Internal square Robertson #3 (3.3 mm)
• Overall length: 50 mm
• Drive: 1/4" E6.3
• Dimensions: 50 x 7 x 6 mm (L x W x D)
• Material: Chrome-vanadium steel, through-hardened
• Standards: DIN 3126, ISO 1173, Style E6.3

Applications

Suitable for woodworking, construction, and industrial assembly with medium to large Robertson screws. Manufactured in Vietnam to European standards.