• 【Innovative Groove Lock System】Dual-locking mechanism with grooved lock strips securely grips excess sheet fabric, preventing slipping even during tossing, turning, or children's play.
• 【Gentle Fabric Protection】Features smooth pressure strips instead of sharp metal clips, protecting delicate fabrics like cotton, silk, and brushed materials without tearing or snagging.
• 【Non-Slip Bottom Design】Anti-slip textured bottom with curved base perfectly fits mattress corners and stays securely in place under the mattress.
• 【Universal Mattress Compatibility】Works with latex mattresses, spring mattresses, thin mattresses, and thick tatami mattresses, fitting all bed types and sizes.
• 【Tool-Free Installation】Simple three-step process: position under mattress corners, tuck in excess fabric, and insert lock strip - easy enough for elderly users and children to operate independently.

Specifications:

• Material: ABS
• Quantity: 4 pieces per set
• Individual Clip Dimensions: 7.87 x 3.15 inch
• Lock Strip Length: 5.51 inch