The extended back cap provides additional tungsten electrode capacity for deep joint access. Adds approximately 25mm to standard electrode length. The knurled surface allows for easy installation and removal. The brass construction offers excellent heat dissipation. The internal threads are precision-cut for smooth engagement. Compatible with all standard WP17 and WP18 series torches. The elongated design is ideal for reaching into pipes, tubes, and confined spaces. The ergonomic shape fits comfortably in the hand during operation. Helps reduce electrode waste by allowing full utilization of each tungsten.