Favorite tool

I've had this measuring caliper in my toolbox for years and years. It gets a lot of use. It cost less than $10 when I got it, and it STILL costs less than $10 from Universal Cycles. Made in Germany. Measures in metric and English with a vernier scale to get precision to 1/10 mm -- useful to have when the difference between an ISO headset race and a JIS headset race is 0.4mm.