Wera 05135273001 Screwdriver Insert Bit 0 Point 4 Mm

Product Description

The WERA 05135273001 is a precision screwdriver insert bit designed for use with 4 mm drive tools. Rated at a No. 0 Phillips point size, this bit is built for fine, detail-oriented fastening work where accurate torque application and bit engagement matter. The overall length is 2.5 inches, making it well-suited for inline screwdrivers, bit holders, and precision drive handles. Weighing just 0.025 pounds, it is a compact tool accessory intended for technicians who require consistent, repeatable performance on small fasteners in tight spaces.

This insert bit is appropriate for residential and light commercial service environments where precision fastening is required. Typical applications include control board work, panel assembly, small enclosure fastening, and any service task involving No. 0 Phillips head fasteners. Electricians, HVAC technicians, and instrumentation technicians commonly reach for bits in this size range when working on delicate electronic components or low-voltage control assemblies.

Key Features

• No. 0 Phillips point for use on small, fine-threaded fasteners
• 4 mm drive size compatible with standard precision bit holders and inline screwdrivers
• 2.5 inch overall length suits both direct-drive and extended-reach applications
• Precision style construction for controlled fastening in sensitive assemblies
• Lightweight at 0.025 pounds, minimizing hand fatigue during detailed work

Compatibility

Designed for use with 4 mm drive precision screwdrivers, bit holders, and compatible inline drive tools that accept standard insert bits.

Installation Notes

This insert bit is installed and removed by hand into a compatible 4 mm drive holder or screwdriver handle. Always ensure the bit is fully seated in the drive before applying torque to avoid cam-out or fastener damage. When working on electrical or electronic assemblies, de-energize the equipment per applicable NEC or equipment manufacturer guidelines before beginning fastener work. Inspect the bit tip for wear before each use and replace if the point shows signs of rounding or deformation.