Conventional "spanner" wrenches are perfect for spring perches with square notches, but they don't work well on newer Penske and ICP/Hyperco perches with round holes. This special tool is made to fit newer perches without modification.
The 1/4" diameter round shaft fits the round holes in most Penske spring perches, as well as ICP/Hyperco hydraulic perches. The easy-grip handle is on the shaft centerline, so there is much less risk of the tool slipping and causing injury. Measures 4 3/4" overall with a 1" long shaft. Handle design may vary.