The robust triangle design provides triple protection, ensuring a longer-lasting grip. Suitable for almost all types of bedding. 4 pcs sheet straps, original length from 9.5 cm to 16 cm, extendable from 25 cm to 45 cm, adjustable length to achieve desired tension. Designed to hold the sheet securely in place, ensuring a smooth and wrinkle-free surface for best results. Suitable for bed sheets, ironing board covers, chair covers, sofa covers, mattresses, blankets, quilts, tablecloths, etc. Keep your sheets or ironing board covers secure with these 4 black straps! They feature plastic-coated metal clips that hold the sheet or ironing board cover securely in place. 4 pcs white plastic swivel cord lock mechanisms, cord return pulley, and stainless steel bracket