Enhanced Writing Stability with Scientific Weighting:Our silicone pencil weights feature a scientifically balanced design to improve pen/pencil control, reducing hand tremors and enhancing fine motor skills. The 1oz (28.5g) weight provides proprioceptive feedback, helping users with autism, ADHD, tremors, or stroke recovery achieve smoother,more controlled handwriting. Universal Fit with Adjustable Open-End Design: Our innovative open-end triangular design sets us apart from traditional weighted grips, ensuring seamless compatibility with a wide range of writing tools (7-14mm in diameter)-including fountain pens, gel pens, pencils, brushes, markers, crayons,and more. the weight onto your preferred utensil for a secure, customizable fit that enhances comfort and control. Dual-Function Silicone Grip for Comfort & Control:Made from soft, silicone,our weights protect your pens while serving as an ergonomic grip. The smooth,rounded edges reduce hand fatigue during long writing sessions,promoting a stable,comfortable hold for kids,adults and seniors. All-Ages Solution for Needs:Ideal for: Kids - Builds proper grip & handwriting skills. Adults - Improves precision for artists/professionals. Special Needs - Assists with dyspraxia, tremors, or sensory processing disorders. on and adjust for instant balance control-no assembly required! Perfect For Handwriting practice, occupational therapy, tremor relief, and fine motor skill development. Color: Black Material: silicone Package Contents: 5-Pack Weighted Pencil Grips Only the above package content, other products are not included.