Sequelize join source model into target model

I have these models:

module.exports = function(sequelize, DataTypes) {
    const Tool = sequelize.define('Tool', {
      Price:  {type: DataTypes.STRING(255)},
      PurchaseDate: DataTypes.DATE,
    });

  return Tool;
};

module.exports = function(sequelize, DataTypes) {
    const RepairOrder = sequelize.define('RepairOrder', {
      OrderNumber: {type: DataTypes.STRING(255)}
    }, {
      classMethods: {
        associate(models) {
          RepairOrder.belongsTo(models.Tool, {as: 'Tool'});
        }
      }
    });

  return RepairOrder;
};

module.exports = function(sequelize, DataTypes) {
  const Hammer = sequelize.define('Hammer', {
    Color: {type: DataTypes.STRING(255)}
  },
  {
    classMethods: {
      associate(models) {
        Hammer.belongsTo(models.Tool, {as: 'Tool'});
      }
    }
  });

  return Hammer;
};

module.exports = function(sequelize, DataTypes) {
  const Spanner = sequelize.define('Spanner', {
    Size: {type: DataTypes.STRING(255)}
  },
  {
    classMethods: {
      associate(models) {
        Hammer.belongsTo(models.Tool, {as: 'Tool'});
      }
    }
  });

  return Spanner;
};

Because of the belongsTo methods Hammer and Spanner have a ToolID column. Now I want to receive all Repair Orders with the Tool information, so I join the tools into the Repair Orders.

RepairOrder.findAll({
  attributes: ['ID', 'OrderNumber'],
  include: [{
    model: Tool, as: 'Tool'   
  }]
});

But I also want to know which type(Hammer or Spanner) of tool it is when selecting the Repair Order, so how can I join both into the Tool? Something like

RepairOrder.findAll({
      attributes: ['ID', 'OrderNumber'],
      include: [{
        model: Tool, as: 'Tool',
        include: [{'JOIN ON "Hammer"."ToolID" = "Tool"."ID"'},
                  {'JOIN ON "Spanner"."ToolID" = "Tool"."ID"'}]
      }]
    });

via frichter