The park tool ct5 mini brute chain tool for 5 10 speed chains is a small chain tool which goes anywhere and actually performs like a full size workshop tool incredibly handy to just throw in a pack this fantastic bike tool weighs in at only 77 grams so won39t weigh you down as you cycle this park tool chain tool has been given a fine thread and slide away t handle which gives plenty of pressure at the pin head to move stubborn chain rivets easily what39s more the special v shaped hand