These colorful Pen & Pencil Weights assist sensory motor planning. It provides feedback for those with difficulty in vestibular or proprioceptive processing. The O-Rings secure the weights and allow them to be placed anywhere on the writing instrument. Weights are approximately 1.5 ounces. Kit includes: 3 Pencil Weights. Not for use with small children, or any children prone to placing items in mouth due to choking hazzard.