This product uses a unique 'clip and lock' system incorporating a rattle proof stainless steel spring loaded design. Product Information 3728 - Milenco Stacka Corner Feet Pads High quality, durable and robust steel retaining shaft. Can be used with Stacka Jacka Pads 3780 to raise ground level on uneven ground. Key Features Unique 'clip and lock' system Rattle proof stainless steel spring loaded design High quality durable and robust steel retaining shaft Can be used with Stacka Jacka Pads to raise ground level Compatible with Stacka Levels for soft ground conditions One time fit click and lock system Available in 4's and singles Specifications Product Code: 3728 (set of 4) Product Code: 3735 (singles) Why Choose Milenco? Milenco is one of the most trusted names in caravan, motorhome and campervan accessories. With Sold Secure approval on their security products and decades of engineering excellence, Milenco delivers durable, dependable equipment loved by leisure vehicle owners across Europe.