Proto J5441-6M 1/2 Drive Hex Bit Socket - 6 mm
https://www.sawab.app/shop/j5441-6m-proto-j5441-6m-1-2-drive-hex-bit-socket-6-mm-1236
https://www.sawab.app/web/image/product.template/1236/image_1920?unique=b300c89
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Bit holders have a hex opening to hold the bit allowing the bit holder to take the full load of torque.Made of heat-treated alloy steel.Polished chrome finish.