Wiha 75802 System 4 MicroBit Adapter 1/4" Hex Outside to 4mm Inside, 25mm Long
1/4" hex drive insert bit that holds Wiha's System 4 Micro Bits. Holds all SYSTEM 4 Series bits. Shaft CVM steel, hardened, corrosion protected. For 4mm bits. 25mm (1") OAL