Hex key (allen wrench) for Letus adapters and accessories. Small key is a 3/32 inch and is designed for use on the adapter adjustments such as the lens mounts, front tube, and thread ring. Large key is a 5/32 inch key and is designed for making adjustments on the Letus V1 and V2 support rod systems.
The Relay Size allen key is a 1.3mm wrench which is the size you need for the allen screws on the Letus Relays. This key does not work with any screws on the Letus adapters or rods.

