Screwdriver bit holder Wera 899/4/1 stainless steel, 1/4" hex shank, 25.4×4 mm, 100 mm length

Wera 899/4/1 is a stainless steel screwdriver bit holder with a 1/4" hex shank, 100 mm overall length and 10.5 mm diameter. Designed to accept standard 1/4" hex bits (DIN ISO 1173-C 6.3), this bit holder combines a stainless steel sleeve for enhanced corrosion resistance with a strong permanent magnet and a retaining ring to secure bits reliably during manual or powered fastening. The holder is compatible with power screwdrivers that accept 1/4" hex drive according to DIN ISO 1173-F 6.3 and is intended for general workshop, maintenance and installation use where secure bit engagement and corrosion protection are required.

Advantages

The stainless steel sleeve provides superior corrosion protection compared with standard plated holders, extending service life in humid or corrosive environments. A permanent magnet inside the holder ensures firm retention of bits and fasteners, while the retaining ring guarantees optimum axial fit to reduce wobble during use. The 1/4" hex shank offers broad compatibility with standard bits and power drivers, and the 100 mm length gives increased reach for recessed screws.

Suitable for

• Workshop assembly and repair tasks using 1/4" hex bits
• Maintenance and installation jobs in environments with moderate moisture or corrosion risk
• Use with power drivers and manual handles that accept 1/4" hex shanks
• Reaching recessed or hard-to-access fasteners

Key specifications

• Material: stainless steel sleeve with magnetic holder
• Drive type: 1/4" (6.35 mm) hexagon shank
• Standards compatibility: accepts bits to DIN ISO 1173-C 6.3; compatible with drivers to DIN ISO 1173-F 6.3
• Overall length: 100 mm
• Outer diameter (sleeve): approximately 10.5 mm
• Retention: strong permanent magnet plus retaining ring for secure bit engagement

How to use

Insert a compatible 1/4" hex bit into the holder until it seats against the retaining ring and is held by the internal magnet. Fit the 1/4" hex shank into the chuck or quick-change adapter of a manual handle or power driver that accepts 1/4" hex drive. Apply torque appropriate to the bit and fastener; avoid using bits that are worn or damaged. To remove a bit, pull it straight out from the holder against the magnetic grip and release the retaining ring.

Usage recommendations

For long service life, clean the holder and bits after use and avoid prolonged exposure to aggressive chemicals. Select bits in good condition and matched to fastener type to prevent slippage. When using with power tools, observe the torque limits of the driver and use appropriate speed and pressure to maintain secure engagement and minimize wear.