Easy to Assemble because the Strain Relief Locks with the Insert Mechanically and Aligns with the Housing. Ergonomic Design with Slip-Proof Two-Component Molded Housing. Unique Neutrik Locking Bushing and Strain Relief for Cable Diameters 6mm to 12mm. Easy and Reliable Twist Lock System. Improved Kink Protection by Two-Component BushingCable Diameter: 10-16mm Terminals: Screw Type. 4 pole speakON cable connector- screw terminal assembly- chuck type strain relief for cable diameters 6 to 12 mm SpeakON connectors are the industry-standard for loudspeaker connections. This product series offers extremely reliable and robust cable connectors with a proven twist lock system. SpeakON cable connectors feature solid contacts with screw-type terminals including a stranded wire protection. speakon connector-speaker connector-audio connector