An oak staircase with square oak newel posts and square oak spindles is a beautiful and durable addition to any home. The staircase features a solid oak construction, with the treads, risers, and handrail all made from premium quality oak wood. The newel posts and spindles are also made from oak, and feature a square design that adds a modern and contemporary look to the staircase. The newel posts are the vertical posts that support the handrail and provide stability to the staircase. They are typically located at the top and bottom of the staircase, as well as at any turns or changes in direction. The spindles, on the other hand, are the horizontal rods that fill the space between the treads and the handrail, and are typically located between the newel posts. The square design of the newel posts and spindles adds a clean, modern look to the staircase. The square shape is simple and minimalistic, yet still elegant and sophisticated. The oak wood used for the newel posts and spindles is strong and durable, and will stand the test of time. Oak is a hardwood that is known for its strength and durability, as well as its natural beauty. Oak wood has a natural golden-brown color that will deepen over time, adding character and warmth to the staircase.