I added indents to the handle tips of the dibber to add affordance as it was not intrinsically obvious to the user in what way they were suppose to grip the handle. It is integral the user naturally interacts with the handle using a pinch grip as this is one of the areas of dexterity this part of the product is designed to improve

I made handle tips with side grips and top grips. One each of large and small. The large catering to the 95th percentile and the small to the 5th percentile