Screwdriver bit set KWB 128440 — 5 pcs, Hex (imperial) tips, metric sizes 0.7, 0.9, 1.3, 1.5, 2 mm, 28 mm length

KWB 128440 is a set of five micro hexagon bits designed for precision fastening tasks. Each bit is made from high-quality TQ 60 steel, has a satin finish and an extra-long 28 mm length to reach screws in tight or recessed locations. The bits have a 4 mm hexagon shank and are supplied on a practical fastening strip for organized storage and easy selection.

Advantages

The set includes five metric hex tips (0.7, 0.9, 1.3, 1.5 and 2 mm) tailored for the smallest screw connections found in electronics and small appliances. High-grade TQ 60 steel provides durability and wear resistance while the satin surface reduces glare and light reflection. The 28 mm length improves access to hard-to-reach screws without sacrificing control. The 4 mm hex shank ensures compatibility with common bit holders and handles.

Suitable for

• Repair and assembly of consumer electronics
• Maintenance of small household appliances
• Precision mechanical and hobby work

Key specifications

• Bit type: Hex (imperial) tips
• Tip sizes: 0.7 mm, 0.9 mm, 1.3 mm, 1.5 mm, 2 mm
• Length: 28 mm (extra long)
• Shank: 4 mm hexagon
• Material: TQ 60 steel
• Surface finish: Satin
• Pack quantity: 5 bits on fastening strip

How to use

Select the hex tip that matches the screw head and insert the 4 mm hex shank into a compatible bit holder, handle or driver. Apply steady, aligned pressure and turn the tool to tighten or loosen the screw. Use the longer 28 mm length when access is limited; maintain alignment to avoid cam‑out or damage to the screw head. Store the bits on the supplied fastening strip to keep sizes organized and prevent loss.

Usage recommendations

Use bits only with tools that accept a 4 mm hex shank. For delicate electronic assemblies, work with controlled torque settings or a torque screwdriver to avoid over‑tightening. Clean bits after use and store them on the fastening strip to prolong service life.