Spine tester pro by Coop

This newly designed spine tester is just what arrow users have been waiting for

Take your arrow building to the next level with this advanced spine tester perfect for any archer or Pro Shop.

• Index your arrows so the spine is on top of the shaft for better consistency and flight.
• Allows you to tune your arrows so each one flies the same.
• Uses spring tension over dead weight for more consistent and accurate readings.
• Makes for easier readings on your shaft.
• Allows you to tune your broadheads with a built-in arrow spinner.