Each package includes 6 medium(1-inch wide) Linkable Binder Clips. Clip mouths can be opened to hold objects just under 1/2-inch wide. Clip dimensions are 1” in length by 1/2” wide by 2-1/8” high. Each package includes one clip of each of the following colors: Red, Purple: Blue; Orange; Yellow; and Green. Each clip includes one Robo Arm and one Hook Arm. The clips are made of metal and the hook on the end of the Hook Arm is made of plastic. They have the perfect amount of clipping tension. Strong clamps for almost every use. Easy to open because of added leverage from their extra-long arms.