McMaster 6822A12 Pocket Diameter-Measuring Tape Measure, 1/4"- 23" Diameter Range, 100ths Graduation Marks

For quick diameter measurements on the go, these tape measures are as small as a pack of gum to tuck into your pocket. There's no math involved—just wrap the blade around your cable, pipe, or other cylindrical object. The number that overlaps with zero is your diameter. These tape measures are ideal for already mounted objects since you don't need to take your system apart. Also known as tree tapes.

Automatic Blade Return — The blade zips back into the case when you let go.

Nonlocking Blade Lock — Pull the blade out and hold it in place between your fingers. These free-moving tape measures are best for taking frequent, small measurements.

Chrome-Plated Metal Case—Choose metal cases for your toughest industrial jobs, from construction to machining. These cases resist breaking due to hard hits and drops. However, they're heavier to carry around than plastic cases.