Aaron Ramsey insists Arsenal's new British core can mature together.
"I'm really pleased to get my contract sorted out," he told Arsenal Player. "It was an easy decision. I had a few years left on my contract but extended it again, which is pleasing.
"It is great news [that the other four have also signed], all of them are very talented and have a big future.
"Jack always competes, always wants the ball and his determination is second to none. Gibbo is always up and down the flank and gets into some great positions. He scored against Swansea and also has a couple of assists this season, so that's been good for him.
"Carl is a solid right back with a great engine, who can get up and down his flank as well to support his winger and get crosses in. Chambo is exciting, he can beat a player and can also finish as well.
"Obviously we are going to get better and more experienced, so hopefully we can achieve something with this group of players."