Wiha 75977 68 Piece Micro Screwdriver Insert Bit Set

Product Description

The WIHA 75977 is a 68-piece micro bit set designed for precision fastening work across electrical, electronics, instrumentation, and light mechanical applications. The set covers four tip types — Hex, Phillips, Slotted, and Torx — in a compact, organized case. Hex sizes span 0.70 mm to 4.00 mm (0.05 inches to 5/32 inches), Torx sizes run T-1 through T-20, Phillips covers 000 through 2, and Slotted sizes range from 0.8 mm to 4 mm. Licensed electricians, instrumentation technicians, and field service pros reach for this set when working with small-head fasteners on control panels, terminal enclosures, and electronic assemblies.

The 75977 is suited for residential and light commercial service environments where micro fasteners are common — including low-voltage control wiring, panel assembly, appliance repair, and precision equipment maintenance. The broad tip-type coverage in a single case makes it practical for technicians who need to carry one kit across multiple job types without hunting for individual bits. The included case keeps bits organized and protects tips from damage between uses.

Key Features

• 68 total pieces covering Hex, Phillips, Slotted, and Torx tip types in a single set
• Hex range: 0.70 mm to 4.00 mm (0.05 inches through 5/32 inches), 8 sizes total, 16 bits
• Torx range: T-1 through T-20, 11 bits included
• Phillips sizes: 000, 00, 0, 1, and 2 — 5 bits total
• Slotted sizes: 0.8, 1.2, 1.5, 1.8, 2, 2.5, 3, 3.5, and 4 mm — 9 bits total
• Compact organized case for field transport and bit protection

Compatibility

Designed as a general-purpose micro insert bit set compatible with standard 1/4-inch hex shank screwdrivers and bit holders that accept insert-style bits.

Installation Notes

Insert bits should be seated fully in the driver or bit holder before applying torque to avoid cam-out or tip damage on small fasteners. Always de-energize and lock out electrical panels or low-voltage control circuits before driving fasteners in live enclosures. Inspect bit tips before use — worn or deformed micro bits can damage precision fastener heads that are difficult to extract. This set is intended for use by qualified technicians following applicable codes and manufacturer service procedures.