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There is a Legacy version here.

PFS StandardSavior SpikeItem 2

Consumable Force Magical Talisman 
Source GM Core pg. 267 2.0
Price 7 gp
Usage affixed to armor; Bulk
Activate [free-action] (concentrate); Trigger You attempt to Grab an Edge but haven't rolled
This pyramid-shaped spike is attached to an armor's chest piece. When you activate the spike, it shoots a strand of force to help you gain purchase, giving you a +1 item bonus to the check. If you roll a success on the triggering attempt, you get a critical success instead. If you roll a critical failure, you get a failure instead.