Heat Tools and Troubleshooting Videos on this page:Shrinkfast 998 Heat Tool RepairHow to Properly Fire a Shrinkfast 998 Heat ToolHow to Install a Shrinkfast 998 ExtensionElectric vs. Propane Heat ToolsExploded View of Shrinkfast 998 (parts breakdown)Exploded View of Rapid Shrink 100 (parts breakdown) Shrinkfast 998 Heat Tool Repair Here’s a detailed, step-by-step rebuild video for the Shrinkfast 998 heat tool. How to Properly Fire a Shrinkfast 998 Heat Tool Here is a quick video demonstrating how to properly fire a Shrinkfast 998 Heat Tool. How to Install a Shrinkfast 998 Extension Explanation of the Shrinkfast 998 Heat Tool Kit in detail and also how easy it is to install a 4′ extension. Electric vs. Propane Heat Tools We here at Dr. Shrink know that a propane fired heat tool is the only way to go. Here’s a quick demo to show you just in case you were on the fence.