Eggbutt French Link Bit is a fixed cheek bit, that is useful for horses that are a bit unsure of the bit as it doesn't move around to much in the mouth. However it would be less suitable if your horse is prone to leaning or taking hold of the bit.
The pressure of the bit is distributed over both the tongue and bars of the mouth. The French link uses tongue pressure to encourage the horse to go on the bit and has bar and lip pressure but not a squeezing action like that of a bit with a single joint.