Specifications:Made of ABS material, it is thick and textured.Multiple non-slip stripes is equivalent to being embedded in the bottom of the mattress and will not lift the mattress.Folding design is suitable for mattresses of different thicknesses, and 4 mattresses and sheets are clamped in four packages, giving you a neat and clean bed.Before folding, it is suitable for mattresses of 15cm and above, and after folding, it is suitable for mattresses of 5cm-15cm thickness.Using Method:Take off the fixed buckle, lift the mattress slightly, and put the fixed buckle base into the four corners of the bed.Put 1-2 clip in each corner, put the buckle into the big hole on the bed sheet cover, and push the card upwards fix it with small holes; it is best to fix the feet of the bed, 4 or 8 clips is enough.Item Name: Quilt Cover HolderMaterial: PlasticQuantity: 4PcsFeature: Strong, Anti-skid, Fine Workmanship, Stable FixingUnfolding Size: 19cm x 11.5cm x 3cm/7.48" x 4.53" x 1.18" (Approx.)Folding Size: 11cm x 11.5cm x 3cm/4.33" x 4.53" x 1.18" (Approx.)Notes:The upper hole is slightly smaller, and it is recommended to clamp spring and summer sheets of ordinary thickness; the lower hole is slightly larger, and it is recommended to clamp winter sheets.Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:4 x Quilt Cover Holders (Others Not Included)