This product is an Arm. You may need to purchase other components to complete your setup

• Consists of a 1/4"-20 female threaded security knob and key knob
• Replaces all knobs on 1" diameter B size arms and mounts
• Offers the ideal amount of leverage to properly tighten your mount to prevent slippage in heavy chop or in extreme vibration environments
• Low in profile and only adds a small amount of additional bulk to your system when compared to the standard knob included
• This additional peace of mind and tamper resistance comes at a very affordable price
• The perfect accessory for keeping your mounted electronic device safe from theft and tampering