Bike Bicycle Chain Measurement Ruler Chain Wear Degree Gauge Replacement Tool 

Specification:
Category: Cahin measuring tool
Color: Black
Weight: About 37g
Function: Measurement of chain wearing degree
Use: .75 scale insertion， recommending replacing the chain; 1.0 insertion， strong abrasion of chain， replacement is necessary..
 
Features:
Portable and easy to carry.
Useful tool for measuring the chain wearing degree， convenient for you to make a replacement.
 
Package Includes:
1 x Chain Ruler