Bit Holder Wera 3888/4/1 K Rapidaptor

Universal holder for bits with a 1/4" hexagon head drive (DIN ISO 1173-C 6.3). The Wera 3888/4/1 K Rapidaptor is made from stainless steel to resist corrosion and is 50 mm long with a 1/4" (6.35 mm) hex shank. Weighing approximately 27 g, the holder is compatible with power screwdrivers that accept DIN ISO 1173-F 6.3 take-up and includes Rapidaptor technology for tool-free insertion of bits.

Advantages

The stainless design prevents extraneous rust and increases durability. Rapidaptor technology enables quick, one-handed bit insertion without actuating the sleeve, while simple removal is achieved by pushing the sleeve forward for fast bit changes. The 1/4" hexagon shank conforms to ISO standards, ensuring compatibility with common power screwdrivers.

Suitable for

• General fastening and screwdriving with power screwdrivers
• Work requiring frequent bit changes
• Tight or confined spaces where a short 50 mm holder is advantageous
• Use with bits that have a 1/4" hexagon head (DIN ISO 1173-C 6.3)

Key specifications

• Brand: Wera
• Model: 3888/4/1 K Rapidaptor
• MPN: 05 071100 001
• EAN: 2050000432491
• Drive: 1/4" hexagon (DIN ISO 1173-C 6.3)
• Shank compatibility: DIN ISO 1173-F 6.3
• Length: 50 mm
• Material: stainless steel
• Weight: approx. 27 g

How to use

Insert a 1/4" hex bit directly into the Rapidaptor chuck without pressing the sleeve; the mechanism grips the bit automatically. To remove the bit, push the sleeve forward and pull the bit out. Use the holder in the power screwdriver’s take-up that conforms to DIN ISO 1173-F 6.3 and apply steady pressure when driving screws to maintain engagement.

Recommendations

For longer service life, keep the holder clean and dry; avoid prolonged exposure to saline or heavily corrosive environments despite the stainless design. Match bits to the correct 1/4" hex size and verify compatibility with your power screwdriver's take-up standard before use.