DA-3 Tech Tip: Pulling Keys

Included in the DA-3 Kit are pulling keys, composed of two different alloys and thicknesses, with either twisted or straight legs, all of which serving a different purpose. 

• The thickness of keys affects the strength of the pull needed or the area of damage. Ex: When pulling a lightweight fender, a 1.0mm thickness would be the best choice, while pulling a thicker cab corner on a truck would be better with a 1.5mm thickness key. 
• The straight vs twisted key gives the tech the ability to position the eyelet or key opening to make a pull at the best angle for the damage. This also assists with placing the pull bar legs in certain positions to avoid secondary damage to panels. 
• The alloy makeup is Mg (magnesium) vs. Si (silicon). Different OEMs or vehicle makers use different aluminum to produce their vehicles. Many European manufacturers have a silicone additive, making the Si key the best choice. Many American manufacturers use magnesium, making the Mg key the proper choice. The information of material can occasionally be found in the OEM repair information. 

PRO TIP: Keep in mind that the required welding wire being used can be a clue. Example: 5554 for Ford is a Mg makeup, while 4047 for Audi is a Si makeup.