This is the RPM Shock Duplicator.

• Works with most 1/8, 1/10 or 1/16 scale shocks
• For use with all shocks up to 6-1/4" (158mm) long using 4-40 or 3mm mounting screws
• Compares two shocks at once (shocks not included)
• Allows precision length measurement, pivot ball clearance and more
• All gauge indicator and scale readings molded directly into tool

• RPM Shock Duplicator with Shock Mounting Hardware and Instructions jxs 09/17/15 ir/jxs

• (Any special application or something it will not work with?)