【Furniture Sliders】Package Contents: Set of 40. Size: 16mm diameter. For most wooden furniture with round or square legs! Easily move chairs, tables, sofas, beds, cabinets, and many other pieces of furniture. 【Nail-in for Secure Attachment】Nail-in sliders specifically for wooden furniture. Since they are screwed directly into the legs, heavy sofas and cabinets are completely secured during movement. Unlike peel-and-stick types that can come off, there is zero snagging or slipping on carpets. 【Floor Protection & Noise Reduction】Strongly protects against scratches and dents on hardwood floors, tatami mats, and tiles. Reduces squeaking and friction noises during movement by 90% (soundproofing effect). Extends furniture life as floor protection pads! 【Effortless Moving】Achieve smooth movement on various floor materials, from hard wood floors to thick carpets. Even heavy furniture can be moved with relatively little force, making it easy for women and the elderly to operate. Simply place them under your furniture to reduce snagging and wobbling.