The Proto J46412 SAE Hex Key is a versatile tool that will come in handy when you need to tighten or loosen fasteners. The hex key has an arm length of 6 in. and a 3/16″ tip size. It also features a black oxide finish for protection against corrosion, as well as a plain handle design with plastic handle material and red handle color. Made of alloy steel, the hex key offers superior strength and durability. When it comes to working with fasteners, the Proto J46412 SAE Hex Key is the tool you will want to have on hand.