The Brace Tool Blind Box is a tool that connects to the tool string to serve the purpose of jarring on an obstruction downhole. It is a durable part with solid construction to reduce damage to the tool. It is important to choose the correct blind box O.D. to cover the area of obstruction, ensuring the blind box is not too large to pass any restrictions that maybe encountered. If using the Blind Box to retrieve lost wire, ensure the diameter is large enough to stop wire from passing beside the Blind Box in the well bore.