These Ti-coated power tool bits have a 6.35mm hex (1/4") that fits our P1 cordless hobby screwdriver.

Specs:

• Material: HSS (Ti-Coated)
• Nutdrivers: 4, 5.5, 7 & 8mm
• Length: 100mm
• Hex Dimension: 6.35mm (1/4")

Suitable for:

• Nut Driver 4.0mm: For M2 nuts
• Nut Driver 5.5mm: For M3 nuts
• Nut Driver 7.0mm: For M4 nuts
• Nut Driver 8.0mm: For M5 nuts