The insertion of contacts is made by the inserter LK INS ( 12, 16, 18, or 20 following the contact size ). For easier contact insertion use an alcohol lubricant. LK INS12 Inserter for pin size 12 (LKS - LKH) LK INS16 Inserter for pin size 16 (LK 13-85 poles) LK INS18 Inserter for pin size 18-20 (LK 150-200 poles)