Secure your investment by installing our Tuff Stuff security nuts. Our 6mm is made specifically for our roof-mounted awning. Our 8mm and 10mm are made specifically for our roof top tents. The type of hardware will determine the size that you require. If you have slider hardware you'll need the 8mm security nuts. If you have the T-Slot hardware you'll need the 10mm security nuts. The security nuts include 8 qty security nuts and 1 qty key to tighten or loosen the nuts at any time. Hardware is sold separately or was provided with your tent. New tent purchases have the slider hardware. Very Important 6mm secure our Awnings (too small for securing the tents) 8mm secure our Tents with Slider Hardware (security nuts only, does not include hardware) 10mm secure our Tents with T-Slot Hardware (security nuts only, does not include hardware)