BlueChip picks are the perfect connection to your instrument. Nothing comes close to the seamless relationship BlueChip picks give you. The goal of Blue Chip picks is to get out of your way, to allow you to forget about the pick and just create without thought of wear, slippage, and poor tone.
The CT55 is a pick custom designed by Chris Thile for his personal use.
It is very similar in size and shape to Blue Chip's TAD line of picks, however, it is only manufactured in 55/1000 of an inch(1.4mm) thickness and has a custom bevel per his specifications.