Micro RONI Thumb Rest $19.99 (0) No Reviews yet SKU: 2607 Quantity discounts available QuantityPrice QTY. -+ Add to Cart Product Description Designed for use with the Micro RONI, this set of thumb rests allows for a firmer grip and more control. Left and Right thumb rests included. Reviews 0 BackRatings & ReviewsNo reviews availableBe the first to Write a Review