These drill bits are perfect for making high-precision holes. 1mm in diameter, they are durable and easy to use, and feature a special finish to prevent snapping. Fit snugly into pin vises and offer very minimal deviation for a true hole. The image at right gives a comparison of the different Tamiya fine pivot drill bit sizes and specifications (current as of February 2022).?Recommended for use with Fine Pin Vise D and Item 74112 Fine Pin Vise D-R.