PSA: When using a GriGri with a BD gridlock follow the user guide : r/climbing
Amazon.com : Petzl GRIGRI + Belay Device with Cam-Assisted Blocking and Anti-Panic Handle, Suitable for Learners and Intensive Use - Grey : Sports & Outdoors
GRIGRI® — Native Summit Adventure Outfitters
Petzl GRIGRI® - Assisted-Braking Belay Device – The Edge Rock Gym - Miami Gear Shop