The Permaswage® DLT5103 Hex Key is a precision tool specifically engineered for use with DLT swage systems and associated tube cutter assemblies. It is essential for operating the drive screw mechanisms on cutters such as the D12530-001, D12531-001, and D12532-001. It is included in various DLT tool kits supporting tubing sizes from #3 (3/16) to #24 (1½"). The DLT5103 Hex Key is a crucial component for maintaining swage tool alignment and ensuring clean, accurate tube preparation before swaging operations.