LB - don't know whether these will help
French-Scissor Snap
A French-Scissor Snap is a great replacement for the bolt-style connectors that most leashes feature. Unlike bolt connectors, which require quite a bit of thumb dexterity to operate (and aren’t easy to use with a dog excited to go outside), French-scissor snaps allow you to use several fingers at the same time to open the connector.
Stone Creek HS 85 French Snap
French-scissor snaps use a double-ended, claw-style clamp to connect to your dog’s leash ring. To open them, you simply squeeze the main part of the clamp together, which causes the clamps to open. Once you release the pressure on the connector, the clamps close and keep the leash connected to your dog’s collar.
These types of connectors offer great value for owners battling arthritis, but many owners like to switch to these types of connectors for convenience alone.
Trigger Snap
A trigger snap is like a cross between a French-scissors connector and a traditional bolt-style connector. It uses the same type of clamp closure that French-scissor snaps do, but it uses an asymmetrical design; instead of squeezing the mid-point of the clamp as you would with a French-scissor snap, these snaps use a thumb-operated “trigger.”
Quality Chrome 2-3/4' Trigger Snap Hook 5/8' Swivel Eye - Great for Pet Leashes, Bag Straps
To open the clamp, you’ll simply press down on the trigger with your thumb. Once it is in place, you can just release the pressure and it’ll close around the collar ring. These types of connectors are often quite secure, and some people find them easier to operate than bolt- or scissor-style connectors.