Evelots Bed Sheet Grippers Adjustable Any Size Mattress Car Seat Cover- Set of 4 These sheet grippers secure your sheet corners diagonally across any size mattress. They can also be used to secure table covers, car seat covers or grill covers. All sheet and bedding covers will be tightly held in place without harming any delicate fabric. Features a metal gripper that will hold the sheets securely and won't damage your sheets. Fully adjustable elastic material and metal clips measuring approximately 6.75" not stretched. Comes with 4 total black sheet grippers. Trusted vendor. For years Evelots has provided unique products with a 30 day easy return policy, and 100% satisfaction guarantee.