Proto J46314 Standard Arm Hex Key - 4 mm
https://www.sawab.app/shop/j46314-proto-j46314-standard-arm-hex-key-4-mm-1384
https://www.sawab.app/web/image/product.template/1384/image_1920?unique=b300c89
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This Metric Hex Key has a 4 mm hex bit size.68 mm long arm.24 mm short arm.Heat-treated for durability.Rust resistant black oxide finish.