Robertson Square Bit Professional 90 mm, #1, 1/4" E6,3 - Wiha 39206

The Wiha Bit Professional 7048Z with internal square Robertson #1 (2.3 mm square size) targets the Robertson drive, increasingly used alongside metric fasteners in industry and construction. The tapered tip simplifies insertion into hard-to-see screw heads, while through-hardened chrome-vanadium steel ensures lasting dimensional stability and torque transfer.

Benefits

• Tapered tip allows easy insertion into the screw head - less time spent locating the drive recess
• Through-hardened chrome-vanadium steel for high wear resistance
• 90 mm length for good access in confined installation situations
• 1/4" E6,3 drive to DIN 3126 and ISO 1173 - fits standard bit holders
• Robertson #1 (2.3 mm) for precision mechanics and small fasteners

Technical data

• Profile: Internal square Robertson #1
• Square size: 2.3 mm
• Overall length: 90 mm
• Drive: 1/4" E6,3 (DIN 3126, ISO 1173, style E 6.3)
• Dimensions: 90 x 7 x 6 mm (L x W x D)
• Material: Chrome-vanadium steel, through hardened

Applications

Suitable for all Robertson screw fastening applications in trade and industry. Made in Germany.