This device tucks sheets to insert between mattress & usually box spring, no repeated hand lifting While mattress rest on one lifter peak, can use another lifter effortlessly tucking sheets, tidy up FASTER EASIER change sheets by two lifters relay alternatively, help replace bed skirt(video demo) Eco-friendly, comfortable handle, easy to use, more helpful if for heavy mattress, patent pending NOTE: a. This tool will not work if mattress is recessed more than 1.3 inches on any base, b. Even If it is recessed less than 1.3 inches, you need to be able to slide this device freely on the base surface (not recommend for mattress on railing bed, slats platform, soft foam base or similars) See more product details