Description: Material: metal nail, plastic base,high density fine felt pad. Function:Anti-slip,prevent from marring and scratches,reduces friction vibration and noise while moving furniture chairs tables and lengthen the life of them and floor. Easily mounted onto bottom of wooden Furniture Chairs Tables by hammering. Lasts far longer than stick-on pads and easier replacement. Notice:You'd better pre-drill pilot hole for hardwood to prevent nail from bending and plastic case from breaking.