Informally known as Count Sprockula, this is a bicycle tool I created, developed, and tested over the past few years to help myself—or now, any other professional bicycle mechanic—quickly determine the tooth count of the lowest gear on a cassette or multi-speed freewheel.

Features:

• Flanged edges for easy positioning on cassettes and multi-speed freewheels
• Easy-to-read scale ranging from 23-54 teeth (future-proof!)
• Ball bearing gauge
• Wooden pinch grip
• Notched for easy hangin'
• Stainless steel construction
• Made in the USA!

Disclaimer:

Marks and imperfections from the bending and laser-cutting process are part of the deal. These were built for function, not flawless looks—though they do look pretty cool. 

PS To the non-mechanics out there: maybe instead of that case of beer, grab one of these and gift it to your local bike shop for always being there when you needed them most. They'll love you for it. <3