SZ-7 Apex Socket Head (Hex-Allen) Bit with Drive Adapter, 3/8'' Square Drive | Dotco Tool
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Amazon.com : Wiha Sys 4 Micro Bit Adapter 4mm to 1/4" 25mm : Sports & Outdoors
3D Printable Precision Driver Adapter (4mm & 3.5mm) by Jim Dewhurst
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1544 | Donau Adapter for 4mm Mini-Bits, 1/4 | Distrelec International
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Wiha 75802 System 4 MicroBit Adapter 1/4" Hex Outside to 4mm Inside, 25mm Long - - Amazon.com
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