The stainless steel screw furniture leveling feet help level your furniture with ease get rid of the wobble.Screw in leveler to the height you desire to level your chairs and tables.They allow raising your furniture, prevent your furniture and floor from being scratched and damaged,and reduce friction and noises while moving furniture. Sizing – 5/16″ diameter shaft – 18 threads per inch – 5/8″ threaded stud length – 1.2″ diameter nylon base. Sizing -5/16″ diameter shaft – 18 threads per inch – 5/8″ threaded stud length – 1.2″ diameter nylon base. Easy to install, if there are screw holes on the furniture feet just replace the old leveling feet, if there are no screw holes on the furniture feet, you need to pre-drill a 5/16 inch hole and screw in the level and adjust to the desired height. Rigid nylon slides are suitable for all types of floors including wood, laminate, hardwood, tile, carpet. Rust-Free and Durable: Furniture Leg Straighteners are made of 304 Stainless Steel, 5/16-18″ thread, stainless steel is completely rust-free, perfect for long-term fixing of furniture cabinets and wet outdoor/indoor environments. Refund or Replacement for any quality problem.