AIM Ambidextrous safety selector kit for AR type firearms. Increase your lower receiver function control and grip. The AIM Ambi Safety Selector has an attractive and durable 7075-T6 Hard coat anodized finish. Lightening cut levers allow for a more tactile grip. It can be configured for a 90 degree long or 45 degree short throw. Features a short lever on the firing hand side to not impede trigger engagement. Use (1/16") allen key for lever installation. Some aftermarket drop in AR triggers will only function correctly in the 90 degree orientation.