I have several different types of this type of woodworking toggle. The little recessed black lever on them isn't as easy to operate as the other types I have that use a separate little lever. The release lever, which is recessed in the main lever, only makes them a bit difficult to access, especially with gloves. It's also worth noting that the 6-inch openings are actually smaller than you might imagine - I often find times I wish they would open just an inch or two more. So consider buying a 12 inch set.