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3/8" Square Drive Bit Holder Adaptors with Phosphate Finish
- High-performance alloy steel
- Square female size: 30 mm, 31 mm, 34 mm
- Hexagon female size: 3/8"
- Phosphate finish
- To be used with machines
- For maximum safety use clamping springs
- For bits with 1/4", 5/16", 11 mm male hexagon drive
- 11 mm size is out of standards DIN 3126-C, ISO 1173
- Drive standard: DIN 3121-F 10, ISO 1174
- Standards: DIN 3126-C, ISO 1173