This handy shop aid is ideal for sizing spokes, ball bearings and crank cotters.

• Has both metric and fractional spoke length markings
• For Spokes: Hang the head of the spoke in the oblong hole and read its length on the scale
• For Crank Cotters and Ball Bearings: Works just like a gauge for drill bits
• Anodized aluminum with embossed markings to allow easy reading and long life