Adaptive Holding Capability: Designed to safely hold a range of wire sizes up to 4mm. Heat Resilience: Silicone heat-resistant construction allows intermittent contact with hot soldering irons - up to 30 sec of direct contact with a 350 C soldering iron. Magnetic Attachment: Integrated with neodymium magnets for flexible attachment on ferrous metal surfaces. Efficient Design: Wide soldering surface caters to varied soldering irons and effectively contains solder drips for a cleaner work environment.