Brand: Dold Item: Interlock system Series: Safemaster Material: 316 stainless steel Requires: Actuating tongue (key) sold separately Contact Type: (3) N.C./(3) changeover contacts (SPDT) Lock Type: Solenoid Interlock Type: Trapped key Key Type: Push-pull Number Of Gates: 4 Dold Safemaster series solenoid trapped key interlock system, push-pull key, 4 gates, 316 stainless steel.