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The PROTO J4990-6MST Hex Bit Socket is a 3/8" drive socket with a 6 mm hex tip. Constructed from heat-treated alloy steel for wear resistance, this socket is designed to minimize distortion and ensure a long service life. The hex opening securely holds the bit, enabling the bit holder to manage the torque load.
Durable alloy steel construction with polished chrome finish. Designed for wear resistance and efficient torque load management.
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